Cambridge O Level Physics Cambridge University Press 2012 Block 3: Multiple-choice questions 1

Block 3For each question, there are four possible answers: A, B, C and D. Choose the one you consider correct.

1 A student stands in front of a plane mirror. Which of the following statements is not correct?A His image is behind the mirror.B His image is a real image.C His image is le! right reversed.D His image is the same size as himself.

2 " e diagram shows what happens when a ray of light strikes a plane mirror. Which two angles are equal, according to the law of re# ection of light?

34

normal

1

2

A angle 1 = angle 2B angle 1 = angle 4C angle 2 = angle 3D angle 2 = angle 4

Mul ple-choice ques ons

Cambridge O Level Physics Cambridge University Press 2012 Block 3 : Multiple-choice questions 2

3 " e diagram shows what happens when a ray of light strikes the inner surface of a glass block. Which of the following statements is not correct?

1 2

3

normal

airglass

A angle 1 = angle 2B angle 3 is the angle of refractionC angle 1 is the angle of incidenceD angle 3 is the critical angle

4 Which diagram correctly shows how a ray of light will pass through a parallel-sided glass block?

A B C D

5 Which arrow correctly indicates the focal length of the lens?

A

B

CD

Block 3 : Multiple-choice questions 3Cambridge O Level Physics Cambridge University Press India Pvt. Ltd.

6 Which diagram correctly shows how a real image is formed by a thin converging lens? (F is the principal focus of the lens.)

A

object

image

B

object

image

C

object

image

D

object

image

F

F

F

F

7 What is the approximate range of audible frequencies?A 20 Hz to 200 HzB 20 Hz to 20 kHzC 200 Hz to 20 kHzD 20 kHz to 200 kHz

8 " e diagrams show the oscilloscope traces produced by four di$ erent sounds. Which sound has the highest pitch?

A B C D

Cambridge O Level Physics Cambridge University Press 2012 Block 3 : Multiple-choice questions 4

9 A boat sends a sound wave down to the seabed at depth X. It detects the re# ected sound wave (the echo) a! er time T.

X

sound waves

echoseabed

Which of the following is the correct expression for the speed of sound in the water?

A XTB (2 X)T

C X(2 T)D (2 X)

(2 T)

10 Which of the following statements is not correct?A Sound waves are longitudinal.B Sound waves require a medium if they are to be transmitted.C Sound waves travel fastest through a vacuum.D Sound waves are produced by a vibrating source.

11 Di$ raction occurs when a wave A strikes a solid surface.B passes through a narrow gap.C changes its speed.D changes its wavelength.

12 What quantity is the same for all electromagnetic waves travelling in empty space?A speedB frequencyC wavelengthD amplitude

Cambridge O Level Physics Cambridge University Press 2012 Block 3 : Multiple-choice questions 5

13 A wave generator with a frequency of 60 Hz produces water waves with a wavelength of 1.2 cm.

What is the speed of the water waves?A 0.30 m/sB 1.2 m/sC 30 m/sD 120m/s

14 Dispersion occurs because A some frequencies of light travel faster than others

through glass.B the angle of incidence is greater than the critical angle.C a wave has passed through a narrow gap.D white light forms a spectrum when it passes through

a prism.

15 Electromagnetic radiation comes in di$ erent forms. Which pair do not appear next to one another in the electromagnetic spectrum?A microwaves, ultravioletB visible light, infraredC X-rays, ultravioletD radio waves, microwaves