V2+Test+FyANVC08+Ch+16 19+Electricity+G Level
Transcript of V2+Test+FyANVC08+Ch+16 19+Electricity+G Level
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Test Ch6FyANVC08 Test Ch 16-19 Electricity NV-College
Directions Please Write your name on all of the papers on your table, NOW!
Test time 14:00-15:20 November 4, 2009
Resources Calculators, and Formulas for the National Test in Mathematics Courses A &
B, and the formula sheet for Physics A, FYANV-College. You may also useyour personalized blue-booklet. The booklet must have your name and no
calculations or solution to any problem are supposed to be on it.
The test: The test is a G-level test and consists of a total of 25 questions. Most of
problems are multiple-choice. Answer all of questions. Below each problem
some space is provided. You are required to show your calculations.
The VG-MVG-level test is given on Friday November 9, 2009.
Score The maximum score is 53 points.
Mark levels The maximum number of points you can receive for each solution is indicated
after each problem.
G: 27 points
VG: -
MVG: -
Have Fun
Behzad
Only the marked problems in the box below will be graded.
Electrostatics:ES DC DC DC DC DC DC ES ES ES Ch 16-19
1 2 3 4 5 6 7 8 9 10 11 12 13 Total Minimum G
2 2 2 2 3 2 3 3 2 2 1 2 2 28
14 15 16 17 18 19 20 21 22 23 24 25 53 27
2 2 2 2 2 2 3 1 2 3 2 2 25
ES ES ES ES DC DC DC ES ES ES ES DC ELECTRICITY
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Base your answers to the problems 1-4 on the figure below which illustrates two point
charges Q
Base your answers to the problems 1-4 on the figure below which illustrates two point
charges Q CC0.51 = and CQ 0.52 = . The charges are pinned to the page of the paper,
and therefore are stationary.
1. At which point the magnitude of the electric field is zero? [1]a. A b. B c. Cd. D e. None
Why? Explain. [1] Answer: Alternative:_______________
2. At which point the electric potential is zero? [1]a. A b. B c. Cd. D e. None
Why? Explain. [1] Answer: Alternative:_______________
A
B C DCQ 0.51 = CQ 0.52 =
cm0.5 cm0.5
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3. If a unit positive charge move from the point D to the point B , the potential energyof the charge [2]
a. decreasesb. first decreases, then increasesc. increasesd. first increases, then decreasese. remains constant through out the journey.
Answer: Alternative:_______________
4. Moving CQ 0.51 = and CQ 0.52 = closer to each other would cause theirelectric potential energy to [1]
a. increaseb. decreasec. first increases, then decreased. first decreases, then increasee. remains constant through out the journey.Why? Explain. [1] Answer: Alternative:_______________
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9. The power and voltage on the light bulb read 100 W 240V. How many amperes willfollow through the light bulb if it is connected to
V220 ? [1]
a. A22 b. A.1 8c. A45.0 d. A.2 5e. mA55. 0
Why? Show your calculations below. [1] Answer: Alternative:_______________
10.At kwhkr/ , what does it cost to use a W hair dryer for min60 ? [1]9.0 2000a. kr9.0 b. kr8.1 c. kr4.5 d. kr6 e. kr7.2
Why? Show your calculations below.[1] Answer: Alternative:_______________
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11.What is the approximate electrostatic force between the electron and proton of aHydrogen atom? We may assume the average distance of the electron from the
nucleus of hydrogen atom is m1010 . [1/0]
11.What is the approximate electrostatic force between the electron and proton of aHydrogen atom? We may assume the average distance of the electron from the
nucleus of hydrogen atom is m1010 . [1/0]53.0 53.0
a.a. N8102.8 attractive.b. N8102.8 repulsive.c. N8102.8 attractive.d. N8102.8 repulsive.
Answer: Alternative:_______________
12.Two identical metallic sphere carry charges mCQ 0.101 = and mC0.6 . Thespheres are brought together, and then separated. The final charge on each sphere will
be: [1]
Q2 =
a. mC0. 16b. mC.6 0c. mC.4 0d. mC.2 0e. .0 0
Why? Show your calculations below. [1] Answer: Alternative:_______________
13.Both the Van de Graff generator and the lady in the picture are charged. Why does herhair stands out? Explain. [2/0]
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14.When you bring a charged insulator rod close to a thin stream of tap water. The streamof water is affected by the charged rod. Why? Explain. [2/0]
14.When you bring a charged insulator rod close to a thin stream of tap water. The streamof water is affected by the charged rod. Why? Explain. [2/0]
15.Two charged Ping-Pong balls separated by a distance of m00.2 exert an electricforce of mN00 on each other. What will be the force if the Ping-Pong balls are
moved away from each other, to a separation of cm0.4 from each other? [1]
15.Two charged Ping-Pong balls separated by a distance of m00.2 exert an electricforce of mN00 on each other. What will be the force if the Ping-Pong balls are
moved away from each other, to a separation of cm0.4 from each other? [1]
.10
a. mN50. .a. mN50. .2b. mN00. .b. mN00. .40c. mN00. .c. mN00. .160d. mN00. .d. mN00. .10
Explain your reasoning: [1] Answer: Alternative:_______________Explain your reasoning: [1] Answer: Alternative:_______________
16.How much work is required to move a single electron through a potential difference of16.How much work is required to move a single electron through a potential difference of
.10
2
40
160
10
kV0.1 ? [1/0]
a. J19106.1 .b. J16106.1 .c. J9109 .d. J3100.1 .
Why? Show your calculations below. [1] Answer: Alternative:_______________
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19.The diagram below represents currents in a segment of an electric circuit. What is thereading of the ammeter
19.The diagram below represents currents in a segment of an electric circuit. What is thereading of the ammeter A ? [1/0]
a. mA1 .b. mA2 .c. mA3 .d. mA4 e. mA6
Why? Show your calculations below. [1]
mA5
mA3
mA2
mA7
A
mA1
mA4
20.A negative charge CQ 0.5 and a positive charge C1 = Q 0.52 += are placed on aplane surface as illustrated in the figure below. A positive point charge is placed at the
point P. The distance between 1PQ is exactly equal to the distance 2PQ .
What is the direction of the resultant force on the point charge P? Explain [1]
a. Towards a. ab
c
de
f
g
h
P Q1
Q2
b.
Towards b.c. Towards c.d. Towards d.e. Towards e.f. Towards f.g. Towards g.h. Towards h.
Why? Show your calculations below. [2] Answer: Alternative:_______________
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Base your answers to the problems 20-23 on the figure below which illustrates an electron
projected into the region between two parallel charged plates which are apart. The
electric field between the plates is
mm0.2
C
MNE 0.2=
mm0.2
21.In which direction will be deflected? [1/0]a. Toward the top of the page.b. Toward the bottom of the page.c. Into the paged. Out of the page.e. It is not going to be deflected.
Answer: Alternative:_______________
22.The force experienced by the electron during the time it is moving between the plates is:a. N19 Downward toward the bottom of the page. [1]102.3 b.
N
13
Toward the top of the page.102.3
c. N19 Toward the top of the page.102.3 d. N13 Downward toward the bottom of the page.102.3 e. The electron is not going to be deflected. Therefore, the total force on the electron
is zero.
Why? Show your calculations below. [2] Answer: Alternative:_______________
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23.The electron is replaced by a proton. Compared to the magnitude of the force on theelectron, the magnitude of the force on the proton will be [1]
a. the same.b. greater.c. less.
Why? Explain. [1] Answer: Alternative:_______________
24.The potential difference across the two plates is: [1/0]a. MVV 0.4=b. kV.V 0.4=c. kV .V 0.1=d. VV 0.4=e. mVV 0.4=
Why? Show your calculations below. [1] Answer: Alternative:_______________
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25.The power and voltage on the light bulb read 100 W 240V. We take it to the USAwhere the electricity used in a common house is V110 . When it is connected to the
power source [1]
a. the light bulb will burn.b. It will work normally as a W100 light bulb.c. It will work as a W25 light bulb.d. It will work as a W400 light bulb.e. It will not work at all.
Why? Show your calculations below. [1] Answer: Alternative:_______________
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