June Monthly Examination in Science 10- PhysicsName:________________________________________________________________ Score:_____________I. Completion

Direction: Complete the table below.

SI Unit of MeasurementBase quantityName of UnitSymbol for unit

Length4. m

1. Kilogram7.

Time5. S

Electric currentAmpere8.

2. kelvin9.

Amount of substance6.mol

3. Candela10.

Derived quantities and their SI unitsQuantityName of unitSymbol of unit

Area3.m2

1. Cubic meterm3

Density4.Kg m-3

VelocityMeter per second5.

2. Meter per second per secondm s-2

II. Computation

I. Direction: Round to the number of significant digits indicated.

1. 5.67498 to 1 significant digit6. 0.04102 to 3 significant digit2. 2.998 to 2 significant digit7. 4. 26, 384 to 2 significant digit3. 37.446 to 3 significant digit8. 49.0385 to 3 significant digit4. 0.00794 to 1 significant digit9. 0.006008 to 3 significant digit5. 825,066 to 1 significant digit10. 30.0026 to 4 significant digit

II. Direction: Determine the number of significant digits in each number.

1. 2605.406. 10, 7332. 0.004207. 990.3. 3258. 0.0004 4. 3000.09. 8000 5. 325.0010. 52,000III. EnumerationDirection: Enumerate the following according to order. Give the 5 rules on identifying significant figures Steps in Rounding off numbers. Give at least (7) prefixes.July Monthly Examination in Science 10 PhysicsI. Fill in the blanksDirection: Fill in the blank with the appropriate term.1. ____________ defined as a reference point combined with a set of directions.2. A ___________ is a measurement of location, with reference to an origin.3. ____________ is the change in an objects position.4. ____________ is a physical quantity with magnitude (size) and direction.5. ____________ is the rate of change in position.6. ____________ is the velocity of an accelerating body at a specific instant time.7. ____________ is the total displacement of a body over a time interval.8. ____________ is the continuous change in position with respect to a reference point.9. ____________ is a vector quantity that can tell the speed of the object as well as the direction of motion.10. __________ is the total length of travel irrespective of the direction of motion.

II. Problem SolvingDirection: Solve the following sets of problems. Show your complete solution.Distance and displacement1. Find the total distance and displacement of a driver who started at market 3 km and ended at -4 km. (5 pts.)(final position) d2d1 (starting position)Displacement 7 km west------ 6 -------5--------4------- -3 ------ -2------ 1-------- 0 ------- 1----------2 ---------3---------- 4 ------- 5----

2. Roger would like to visit Berts house to ask him about their project proposal in Science. In order to reach Berts house, Roger has to walk 500 meters going North and then head towards westward at a distance of 500 meters and afterward turn 200 meters south.Sketch the path traveled by Roger to reach Berts house. Use the scale 1 cm to 100 meter. Indicate position O as the initial position and F as the final position. Measure the total distance traveled by Roger and his displacement. (5 pts.)

3. Suppose a car moves at a speed of 45 kn/hr from 1:00 P.M. to 3:00 P.M. then instantly changes the speed to 50 km/hr from 3:00 to 3:30 P.M. and finally to 60km/hr from 3:30P.M to 5:00 P.M. What is the instantaneous speed of the whole trip? (5 pts.)

4. A grade seven student is walking his way from home to school along a straight road at an average speed of 5 m/s for 5 minutes. What is the total distance traveled by the student? (5 pts.)

5. If the student in problem number 3 returns home to get his project in science, what is his average velocity? (5 pts.)

III. EssayDirection: Answer the following question briefly.

1. What is the relationship between speed and velocity?2. How are instantaneous speed and average speed related to an object with constant speed?

1st Quarterly Examination in Science 10 Physics

1. Direction: For each of the following commonly used measurements, indicate its symbol. Use the symbols to complete the following sentences with the most appropriate unit. Units may be used more than once or not at all. (10 pts.)_____ milliliter_______ millimeter_____ kilogram

_______ Second_______ liter_______ Centimeter

_____ meter_______ kilometer_____ milligram

_______ gram

1. Convert the following metric measurements:1. 1000 mg = _____ g8. 198g = _____ Kg15. 8 mm = _____ cm1. 160 cm = _____ mm9. 75 mL = _____ L16. 6.3 cm = _____ mm1. 109 g = _____ Kg10. 50 cm = _____ m17. 5.6 m = _____ cm1. 250 m = _____ Km11. 5 L = _____mL18. 26,000 cm = _____ m1. 14 Km = _____ m12. 16 cm = _____mm19. 65 g = _____ mg1. 1 L = _____ mL13. 2500 m = _____ Km20. 480 cm = _____ m1. 27 g = _____ kg14. 355 mL = _____ L

1. Direction: Convert each of the following into scientific notation. 1. 727 _________________________________ 1. 172000 _________________________________ 1. 0.000984_________________________________ 1. 200.0 x 102 _________________________________ 1. 0.014 x 102 _________________________________ 1. Direction: Convert each into decimal form. 1. 1.56 x 104 _________________________________ 1. 3.6 x 10-2 _________________________________ 1. 736.9 x 105 _________________________________ 1. 0.0059 x 105 _________________________________ 1. 0.00059 x 10-1 _________________________________

1. Direction: Give the number of significant figures in each of thefollowing. a) 1.05 g ______ D. 0.90 x 1045Lb) 0.0003040 mm ______ E. The number of eggs (12) that make up a dozen.c) 29000 + 10 ft ______

1. Direction: Round each of the following to 3 significant figures.

1. 77.0653____________ 4. 6,300,178.2 ______________ 1. 0.00023350 _____________ 5. 10.2030 _______________ 1. 2.895 x 1021 ______________

1. Direction: Solve the following word problems. Show your solution.1. A girl travels 20 miles on her bicycle. The trip takes 2 hours. Express her speed in miles/hr. (5pts.)

1. A car starts from a stoplight and is traveling with a velocity of 10 m/sec east in 20 seconds. What is the acceleration of the car? (5pts.)

1. A helicopters speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of this helicopter? (5pts.)

1. A car traveling at a speed of 30.0 m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop if it decelerates at -4.0 m/s2? (5 pts.)

1. The following graph shows the velocity of a moving object as monitored over a time period of 8 s. Use the graph to answer the questions that follow: (10 pts.)

(a) Determine the distance traveled by the object between t = 0 s and t = 8 s.(b) Determine the displacement of the object between t = 0 s and t = 8 s.(c) What was change in the objects velocity between t = 2 s and t = 6 s?(d) Find the average acceleration of the object between t = 3 s and t = 8 s.(e) Calculate the average acceleration of the object over the entire 8 s interval

1. A golf ball is dropped from rest into a river from a bridge 55 m above the water. A short time later, a second ball is thrown downward with a speed of 11.9 m/s, and happens to strike the water at the same moment as the first ball. (10pts.)

1. How long did it take the first ball to reach the water?1. How long was the first ball falling before the second was thrown?1. With what velocity did the first ball strike the water?1. With what velocity did the second ball strike the water

September Monthly Examination in Science 10 PhysicsI. Fill in the blanksDirection: Fill in the blank with the appropriate term.1. The ______________ of an object is a measurement of the amount of substance in the object.2. The______________ of an object is the force of gravity acting upon that object.3. _________________ is motion in the earths gravitational field when no other forces act on the object.4. _________________ is the energy an object has due to its position or state.5.__________________ is the energy an object has due to its motion.6. __________________ is the sum of the gravitational potential energy and the kinetic energy.7.___________________ Energy cannot be created or destroyed, but is merely changed from one form to another.8. __________________ the total amount of mechanical energy in a closed system remains constant.9. __________________ is defined as the change in velocity divided by the time taken to make a change.10. Acceleration is always constant at _________________.II. Problem SolvingDirection: Solve the following sets of problem. Show your solution.Weight and Mass:1. The acceleration due to gravity, g, on earth is 9.8 m/s2 and the acceleration due to gravity on bthe moon is one-sixth that on earth. How much does a book of mass of 1.5 kg weight (a) on earth and (b) on the moon? (5pts.)

2. The weight of a standard mass of 1.0 kg (m1) is found to be 1.7 N when it is measured using a spring balance on the moon. An object of unknown mass m2 measured by the same spring balance is found to weight 5.1 N on the moon. What is the mass of the object? (5 pts.)

Acceleration due to gravity

3. An athlete is taking part in a pole vault event. Neglecting air resistance, in which positions is he considered to be moving under free fall? (5 pts.)

4. A tourist drops a rock from rest from a guard rail overlooking a valley. What is the velocity of the rock at 4.0 s? What is the displacement of the rock at 4.0 s? (5 pts.)

5. A car accelerates at a rate of 3.0 m/s2. If its original speed is 8.0 m/s, how many seconds will it take the car to reach a final speed of 25.0 m/s? (5pts.)

Kinetic, Potential and Mechanical Energy5. What is the kinetic energy of a jogger with a mass of 65.0 kg traveling at a speed of 2.5 m/s? (3 pts.)6. What is the mass of a baseball that has a kinetic energy of 100 J and is traveling at 5 m/s? (3 pts.)7. What is the GRAVITATIONAL POTENTIAL ENERGY of the 6 kg cart as it sits the the top of the incline? What is the KINETIC ENERGY of the cart if it is moving at a speed of 2 m/s at the bottom of the ramp? (6 pts.)

8. Find the gravitational potential energy of a light that has a mass of 13.0 kg and is 4.8 m above the ground. (3 pts.)

2nd Quarterly Examination in Science 10 PhysicsI. Fill in the blanksDirection: Fill in the blanks of the appropriate term.1. Stored energy or energy due to position is known as ____________energy.1. The formula for calculating potential energy is ____________1. The three factors that determine the amount of potential energy in an object are ____________, and height of an object.1. Potential energy is measured in units of ____________1. Mass must be measured in units of ____________1. Gravitational pull must be measured in units of ____________1. Height must be measured in units of ____________1. Energy of motion is known as ________________1. The formula for calculating kinetic energy is ______________1. The two factors that determine the amount of kinetic energy in an object are mass and ________________1. Kinetic energy is measured in units of ______________1. Mass must be measured in units of ________________1. Velocity must be measured in units of __________________1. Potential energy is the energy matter has as a result of its ______________1. The more mass an object has the (_____________ / less) potential energy it has.1. The potential energy an object has due to its position is called _______________.1. The formula for calculating gravitational potential energy is _________________.1. The value of the g constant (the acceleration of all objects due to gravity) on earth is _______1. __________________ is defined as the change in velocity divided by the time taken to make a change.1. Acceleration is always constant at _________________.1. The ______________ of an object is a measurement of the amount of substance in the object.1. The______________ of an object is the force of gravity acting upon that object.1. _________________ is motion in the earths gravitational field when no other forces act on the object.1. _________________ is the energy an object has due to its position or state.1. __________________ is the energy an object has due to its motion.II. Identification and fill in the blanksDirection: The illustration below shows a series of transverse waves. Label each part in the space provided. (7 pts.)a. cefabdg

b. c. d. e. f. g. ___________________

8. A ______________ is the substance or material in which a wave will move.9. A ______________ is a single disturbance that moves through a medium.10. The ____________ of a pulse is a measurement of how far the medium is displaced from rest.11. ________________ is the distance a pulse travels in a specific time.12. The ___________ of a pulse is much simpler than the motion of a particle in the medium.13. Waves carry from one place to another.14. The highest point on a transverse wave is the while the lowest part is the .15. The is the height of the wave.16. The distance from one crest to the next is the .

17. Below are a number of series of waves. Underneath each diagram write the numbers of waves in the series.C.B.A.

D.

1 1 2

18. Which of the above has the biggest amplitude? 19. Which of the above has the shortest wavelength? 20. Which of the above has the longest wavelength? 21. ________________ is when two pulses meet, resulting in a bigger pulse.22. ________________ is when two pulses meet, resulting in a smaller pulse.23. The _____________ of the pulse is much simpler than the motion of a particle in the medium.24. The _____________ is the one that arrives at the boundary.25. The ____________ is the one that moves into the new medium, away from the boundary.

III. Problem solving. Direction: Solve the sets of problem below. Show your computation.

1. Jason throws a baseball into a deep well at 4.0 m/s [down]. If it hits the water in 2.0s,(10 pts.)1. How far below the ground is the waters surface?1. What is the balls average velocity?1. How soon after it is thrown does the ball actually acquire the velocity calculated in (b)?1. What is the velocity of ball when it hits the water?

2. A college student wants to toss a textbook to his roommate who is leaning out of a window directly above him. He throws the book upwards with an initial velocity of 8.0 m/s. The roommate catches it while it is travelling at 3.0 m/s [up]. (10pts.)a) How long was the book in the air?b) How far vertically did the book travel?c) Redo the problem, and have the roommate catch the book as it is travelling 3.0 m/s [down]. What is the time and displacement now? Do you notice anything?

3. Calculate the potential energy of a rock with a mass of 55 kg while sitting on acliff that is 27 m high. (5 pts.)

4. Calculate the kinetic energy of the rock in problem #8 if the rock rolls down the hill with a velocity of 8 m/s. (5 pts.)

5. An automobile is sitting on a hill which is 20 m higher than ground level. Find the mass of the automobile if it contains 362,600 J of potential energy. (5 pts.)

6. What distance is a book from the floor if the book contains 196 Joules of potential energy and has a mass of 5 kg? (5 pts.)

November Monthly Examination in Science 10 PhysicsI. Fill in the blanksDirection: Fill in the blank with the appropriate term.1. A ______________ is the substance or material in which a wave will move.2. A ______________ is a single disturbance that moves through a medium.3. The ____________ of a pulse is a measurement of how far the medium is displaced from rest.4. ________________ is the distance a pulse travels in a specific time.5. The ___________ of a pulse is much simpler than the motion of a particle in the medium.6. ________________ is when two pulses meet, resulting in a bigger pulse.7. ________________ is when two pulses meet, resulting in a smaller pulse.8. The _____________ of the pulse is much simpler than the motion of a particle in the medium.9. The _____________ is the one that arrives at the boundary.10. The ____________ is the one that moves into the new medium, away from the boundary.

II. True or false

Direction: : Write T if the statement is TRUE and F if is FALSE.

1. Waves and vibration are the same2. Waves carry energy away from the wave sources.3. Particles of vibrations move in the direction of the wave.4. Sound waves are examples of longitudinal waves.5. The direction of travel of waves is perpendicular to the wavefront.6. Amplitude is the distance between a crest and a trough.7. The longer the period, the higher is the frequency.8. For waves travelling with the same velocity, the higher the frequency, the longer is the wavelength.9. When a displacement-position graph is plotted, it is possible to determine the wavelength from the graph.10. When a displacement-time graph is plotted, it is possible to determine the frequency from the graph.

III. Problem solving

Direction: Solve the following sets of problem. Show your solution.

1. A vibration of frequency 5 Hz sends a wave of wavelength 0.8 m down a rope. What is the speed of the wave? (5pts.)

2. A wave of wavelength 1.5 m travels down a rope at a speed of the 6 m s-1. What is the frequency of the wave? (5pts.)

3. The frequency of some approaching ocean waves is 2 Hz and the length between two wave crests is 3 m. What is the speed of the ocean waves moving towards the shore? (5pts.)

4. Figures (a) and (b) shows the displacement position graph and displacement-time graph of a wave travelling along a length of rope. Calculate the: (15 pts.)

A. The amplitudeB. The wavelengthC. The periodD. The frequency and;E. The speed of the wave.

3rd Quarterly Examination in Science 10 PhysicsI. Fill in the blanks. Direction: Fill in the blank of the appropriate terms.1. ______________ are straight lines with arrow to show the path of light.2. A ______________ is the substance or material in which a wave will move.3. A ______________ is a single disturbance that moves through a medium.4. Objects cast ____________ when light shines on them.5. The ____________ of a pulse is a measurement of how far the medium is displaced from rest.6. A ___________ is a drawing that shows the path of light rays.7. ________________ is the distance a pulse travels in a specific time.8. The ___________ of a pulse is much simpler than the motion of a particle in the medium.9. A __________ cannot be formed on a screen, nor do the light rays pass through it.10. The change in direction (or bending) of light when it passes from one medium to another is called ____________.11. The _____________, i, is the angle between the incident ray and the normal.12. ________________ is when two pulses meet, resulting in a bigger pulse.13. ________________ is when two pulses meet, resulting in a smaller pulse.14. The ____________, r, is the angle between the refracted ray and the normal.15. The ___________, is defined as the angle of incidence in the optically denser medium for which the angle of refraction in the optically less dense is 9016. The ____________ lenses are thicker in the middle than at the edge.17. The ___________ lenses are thinner in the middle.18. The _____________ of the pulse is much simpler than the motion of a particle in the medium.19. The _____________ is the one that arrives at the boundary.20. The ____________ is the one that moves into the new medium, away from the boundary.II. True or falseDirection: Write T if the statement is TRUE and F if is FALSE. 1. Non- luminous sources are seen when they reflect light.2. The angle of incidence is the angle between the incident ray and the mirror.3. The image formed by a mirror is inverted.4. When light travels from glass to air, it bends away from the normal.5. When light travels from air into glass or water, its speed decreases.6. The refractive index n for any medium with respect to a vacuum is always greater than 1.7. The critical angle is the angle in the optically less dense medium for which the angle of refraction in the optically denser medium is 90.8. For total internal reflection to occur, the angle of incidence must be smaller than the critical angle.9. The focal point of a lens is where the image is focused.10. Only three rays, i.e. ray parallel to principal axis, ray passing through the optical center and ray passing through the lens11. Waves and vibration are the same12. Waves carry energy away from the wave sources.13. Particles of vibrations move in the direction of the wave.14. Sound waves are examples of longitudinal waves.15. The direction of travel of waves is perpendicular to the wavefront.16. Amplitude is the distance between a crest and a trough.17. The longer the period, the higher is the frequency.18. For waves travelling with the same velocity, the higher the frequency, the longer is the wavelength.19. When a displacement-position graph is plotted, it is possible to determine the wavelength from the graph.20. When a displacement-time graph is plotted, it is possible to determine the frequency from the graph.II. DiagramsDirection: Solve the following problem sets. Show your solution.III. Problem solving1. Canada balsam, a product of the balsam fir tree, has an index of refraction of 1.53. Calculate the angle of refraction if the angle of incidence in air is 75. Show the diagram. (5 pts.)

2. A transparent substance has a refractive index of 1.30. What is the angle of incidence in air when the angle of refraction in the substance is 45? Show the diagram (5 pts.)

3. A block of unknown material is submerged in water. Light in the water is incident on the block at an angle of 31. The angle of refraction in the block is 27. What is the index of refraction of the unknown material? Show the diagram (5 pts.)

4. A converging lens used as a reading glass is held at less than its focal length from some print. If the focal length of the lens is 15 cm, and the print is 12 cm from the lens, calculate the location and magnification of the image. Show the diagram. (5pts.)

5. A diverging lens produces an image 10 cm from the lens when the object is placed 30 cm from the lens. Calculate the focal length and magnification of the lens. Show the diagram (5pts.)

6. The frequency of some approaching ocean waves is 10 Hz and the length between two wave crests is 5 m. What is the speed of the ocean waves moving towards the shore? (5pts.)

7. A vibration of frequency 15 Hz sends a wave of wavelength 0.8 m down a rope. What is the speed of the wave? (5pts.)

8. A wave of wavelength 1.5 m travels down a rope at a speed of the 6 m s-1. What is the frequency of the wave? (5pts.)

9. Figures (a) and (b) shows the displacement position graph and displacement-time graph of a wave travelling along a length of rope. Calculate the: (15 pts.)

A. The amplitudeB. The wavelengthC. The periodD. The frequency and;E. The speed of the wave.

January Monthly Examination in Science 10 Physics

I. True or FalseDirection: Write T if the statement is TRUE and F if is FALSE.__________ 1. When a magnet is freely suspended, the end which points to the north is the North Pole.__________ 2. Like poles repel, unlike poles attract.__________ 3. When an specimen is repelled by a magnet, the specimen is a magnet.__________ 4. When a specimen is attracted by a magnet, the specimen is a magnetic material but not a magnet.__________ 5. Magnetism can be induced in both magnetic and non-magnetic materials.__________ 6. Outside the magnet, the magnetic field lines start from the N pole and end at the S pole.__________ 7. The neutral point is the point where the magnetic field is the strongest.__________ 8. A soft magnetic material is easier to magnetise.__________ 9. A hard magnetic material is easier to demagnerise.__________ 10. An electromagnet uses soft magnetic materials.__________ 11. A suspended magnet always points in different direction.__________ 12. The process by which the nails become magnet is called magnetic induction.__________ 13. One of the method of demagnetization is cooling.__________ 14. The region around a magnet in which this magnet effect can be detected is called magnetic field.__________ 15. The point combined magnetic field where there is no magnetic effect is called a neutral point.

II. Fill in the blanks. Direction: Fill in the blank with the appropriate term.

1. The end of the magnet which points to the north is called________________.2. The opposite end of the magnet is called ________________.3. Like poles ___________ each other.4. Unlike poles __________ each other.5. Materials which are attracted by a magnet are known as ______________.6. Materials which are not attracted by a magnet are called ______________.7. The process by which the nails become magnets is called_____________.8. The best method for making powerful magnets is ________________.9. The best way to destroy the magnetism of a magnet is to use an _________________.10. Other methods of demagnetisation include _____________ and ______________.11. A material which is easier to magnetise but loses its magnetism easily is called_______________.12. A material which is harder to magnetise but does not lose its magnetism easily is called__________.13. A ___________ is a region of space where a magnet or object made of ferromagnetic material will experience a non-contact force.14. Magnetic fields can be represented using ________________.15. The strength of a magnetic field is referred to as the _______________.

III. Essay. Direction: Answer the following question briefly.1. Explain the difference between the geographical north pole and the magnetic north pole of the earth. (5 pts.)

2. Give examples of phenomena that are affected by earths magnetic field. (5 pts.)

3. Draw and explain the diagram showing the magnetic field around the earth. (10 pts.)

February Monthly Examination in Science 10 Physics

I. True or false. Direction: Write T if the statement is TRUE and F if is FALSE.

1. An object that does not allow electricity to flow is called an insulator.2. When an ebonite rod is rubbed with fur, the rod becomes negative and the fur becomes positive3. An object with 4 positive charges and 3negative charges is electrically neutral.4. A copper wire is an example of a poor conductor.5. The only type of subatomic particles than can travel along a wire carrying electricity are proton.6. Unlike covalent solutions (like kerosene), ionic solution (like salt water) can conduct electricity.7. Oppositely charged objects repel each other whereas similarly charged objects attract each other.8. When a positively charged glass rod is brought close to a neutral pithball, the pithball is attracted to the glass rod.9. When a negatively charged elonite rod touches a neutral pithball, the pithball becomes negative and the rod becomes positive.10. When an object is used to charge a neutral pithball by touching it, we say the pithball has been charged by induction11. When a negatively charged ebonite rod is brought close to a neutral metal leaf electroscope, electrons are attached and travel from the leaves to the sphere at the top of the electroscope.12. When a wire is attached to the neck of a neutral metal leaf electroscope and a positive glass rod is brought close, electrons are repelled out of the electroscope down the wire.13. You can only get a shock after touching a metal object if excess electrons exit your body.14. The leaves of a metal leaf electroscope diverge when they have the same charge.15. When you rob a balloon on your hair, the balloon gains a negative charge. If you place the balloon on a wall, a positive charge is induced on the wall and the balloon and wall now attracted causing the balloon to stick.16. Electrons and protons have the same charge and therefore attract to each other.17. Electric charge is neither created nor destroyed, but can be rearranged.18. When an object is charged by induction electrons flow from the object on to the ground.19. A material is a good insulator if outer electrons of atoms in the material are free to roam around.20. An atom that is electrically polarized vibrates in only one direction.

II. Multiple choices. Direction: Write the complete word/s to complete the statement1. Electrical, light, and chemical phenomena all involve movement or interactions of which part of an atom?

A. ProtonsC. ElectronsB. NeutronsD. The nucleus

2. How does an object become electrostatically charged?

A. From a transfer of protons or electronsB. When electrons are transferred.C. When a protons are transferred.D. From the creation or destruction of charge.

3. A coulomb is a unit of electrical______________.

A. ChargeC. CurrentB. Potential differenceD. Resistance

4. A volt is a unit of electrical_________________.

A. ChargeC. CurrentB. Potential differenceD. Resistance

5. What travels through a conductor at near the speed of light when a current is established?

A. An electric fieldC. ProtonsB. ElectronD. Photons

6. How does an electron acquire a negative charge?

A. From an imbalance of subatomic particle.B. By induction or contact with charge object.C. From the friction of certain objects rubbing together.D. Charge is fundamental property of electron.

7. Which of the following is most likely to acquire an electrostatic charge?

A. Objects that are electrically conductors.B. Objects that are electrically non conductor.C. Conductors and nonconductors are equally likely to acquire electrostatic charges.D. Objects that are grounded.

8. In a electrically neutral atom the number of protons in the nucleus is equal to the number of

A. Electrons that surround the nucleus.B. Neutrons in the nucleus.C. Both of these.D. Neither of these.

9. Strip electrons from an atom and the atom becomes a

A. Positive ionC. Both ionsB. negative ionD. different element

10. Rub electrons from your hair with a comb and the comb becomes

A. Negatively chargeC. Positively and negatively chargeB. Positively chargeD. No charge

11. To say that an object is electrically polarized is to say

A. It is electrically chargedB. Its charges have been rearranged.C. Its internal electric field is zero.D. It is only partially conducting

12. When a car is struck by lightning, the resulting electric field inside the car is_____________.

A. A normally huge, but for a brief time.B. Normally huge for a time longer than the lightning stroke itselfC. Small enough to be safe for an occupant inside.D. Zero

13. When the distance between two charges is halved, the electrical force between the charges.

A. QuadruplesC. HalvesB. DoublesD. None of these

14. A conductor differs from an insulator in that a conductor

A. Has more electrons than protonsB. Has more protons than electronC. Has more energy than an insulatorD. None of these

15. A negatively charged rod is brought near a metal can that rests on a wood table. You tough the opposite side of the can momentarily with your finger. These can then____________.

A. Positively chargedC. UnchargedB. Negatively chargedD. Charged the same as it was.

16. Charge carries in a metal are electrons rather than protons because electrons are____________.

A. NegativeC. Loosely boundB. SmallerD. All of these

17. What allows electrical charges to be redistributed in a conductor?

A. Conductors often have free electrons and positive and negative ionsB. Static electricity is so strong that rips the charges apart.C. Negative charges are heavier, so they often sink to the bottomD. None of these.

18. What does temporarily grounding a charged conductor do?

A. It prevents getting electrical shocks.B. It draws off one charge and leave the opposite charged particles in place.C. You should always permanently ground conductors.D. None of these.

19. How does a charged object attract a neutral non conductor?

A. You cannot attract an electrically neutral objectB. Free electrons in the nonconductor flow toward the charged object.C. None conductor molecules become aligned to attract the opposite charge.D. None of these.

20. A quantity of electric charge is measured in a unit called a(n)___________.

A. CoulombC. WattB. VoltD. amp.

III. EssayDirection: Discuss the following question briefly.1. I have 2 charged positively charged metal balls placed 2m apart as shown in the picture below.

2m apart

a. Is the electrostatic force between the balls attractive or repulsive? Explain. (5 pts.)b. If I now move the balls so that they are 1m apart, what happens to the strength of the electrostatic force between them? Explain. (5 pts.)

4th Quarterly Examination in Science 10 Physics

I. True or False. Direction: Write T if the statement is TRUE and F if is FALSE.

__________ 1. When a magnet is freely suspended, the end which points to the north is the North Pole.__________ 2. Like poles repel, unlike poles attract.__________ 3. When an specimen is repelled by a magnet, the specimen is a magnet.__________ 4. When a specimen is attracted by a magnet, the specimen is a magnetic material but not a magnet.__________ 5. Magnetism can be induced in both magnetic and non-magnetic materials.__________ 6. Outside the magnet, the magnetic field lines start from the N pole and end at the S pole.__________ 7. The neutral point is the point where the magnetic field is the strongest.__________ 8. A soft magnetic material is easier to magnetise.__________ 9. A hard magnetic material is easier to demagnerise.__________ 10. An electromagnet uses soft magnetic materials.__________ 11. When an object is used to charge a neutral pithball by touching it, we say the pithball has been charged by induction__________ 12. When a negatively charged ebonite rod is brought close to a neutral metal leaf electroscope, electrons are attached and travel from the leaves to the sphere at the top of the electroscope.__________ 13. When a wire is attached to the neck of a neutral metal leaf electroscope and a positive glass rod is brought close, electrons are repelled out of the electroscope down the wire.__________ 14. You can only get a shock after touching a metal object if excess electrons exit your body.__________ 15. The leaves of a metal leaf electroscope diverge when they have the same charge.__________ 16. When you rob a balloon on your hair, the balloon gains a negative charge. If you place the balloon on a wall, a positive charge is induced on the wall and the balloon and wall now attracted causing the balloon to stick.___________17. Electrons and protons have the same charge and therefore attract to each other.___________ 18. Electric charge is neither created nor destroyed, but can be rearranged.___________ 19. When an object is charged by induction electrons flow from the object on to the ground.___________ 20. A material is a good insulator if outer electrons of atoms in the material are free to roam around.

II. Fill in the blanks. Direction: Fill in the blank of the appropriate word.

1. The end of the magnet which points to the north is called________________.2. The opposite end of the magnet is called ________________.3. Like poles ___________ each other.4. Unlike poles __________ each other.5. Materials which are attracted by a magnet are known as ______________.6. Materials which are not attracted by a magnet are called ______________.7. The process by which the nails become magnets is called_____________.8. The best method for making powerful magnets is ________________.9. The best way to destroy the magnetism of a magnet is to use an _________________.10. Other methods of demagnetisation include _____________ and ______________.

III. Multiple Choices. Direction: Write the complete word/s to complete the statement

1. Electrical, light, and chemical phenomena all involve movement or interactions of which part of an atom?

A. ProtonsC. ElectronsB. NeutronsD. The nucleus

2. How does an object become electrostatically charged?

A. From a transfer of protons or electronsB. When electrons are transferred.C. When a protons are transferred.D. From the creation or destruction of charge.

3. A coulomb is a unit of electrical______________.

A. ChargeC. CurrentB. Potential differenceD. Resistance

4. A volt is a unit of electrical_________________.

A. ChargeC. CurrentB. Potential differenceD. Resistance

5. What travels through a conductor at near the speed of light when a current is established?

A. An electric fieldC. ProtonsB. ElectronD. Photons

6. How does an electron acquire a negative charge?

A. From an imbalance of subatomic particle.B. By induction or contact with charge object.C. From the friction of certain objects rubbing together.D. Charge is fundamental property of electron.7. Which of the following is most likely to acquire an electrostatic charge?

A. Objects that are electrically conductors.B. Objects that are electrically non conductor.C. Conductors and nonconductors are equally likely to acquire electrostatic charges.D. Objects that are grounded.

8. In a electrically neutral atom the number of protons in the nucleus is equal to the number of

A. Electrons that surround the nucleus.B. Neutrons in the nucleus.C. Both of these.D. Neither of these.

9. Strip electrons from an atom and the atom becomes a

A. Positive ionC. Both ionsB. negative ionD. different element

10. Rub electrons from your hair with a comb and the comb becomes

A. Negatively chargeC. Positively and negatively chargeB. Positively chargeD. No charge

IV. IdentificationDirection: Identify the following electrical symbols. SymbolDescriptionSymbolDescription

1. 9.

2. 10.

3. 11.

4.12.

5. 13.

6. 14.

7. 15.

8.

II. Drawing the circuitDirection: Draw the following circuits according to the instruction given (5 pts. each)1. Draw the circuit diagram for a circuit which has the following components:1. 1 battery 2. 1 light bulb connected in series 3. 2 resistors connected in parallel2. Draw the circuit diagram for a circuit which ha the following components:1. 3 batteries in series2. 1 light bulb connected in parallel with 1 resistor3. A switch in a series.

Direction: Find the equivalent resistance of the circuit shown below. Then calculate the current flowing through the entire circuit. Indicate your final answer in the lines provided. Show your solution. (25pts.)220V4722

Req = _____________________________Ieq = ______________________________