Practice MCQs For Waves, Light, Lens & Sound

This quiz contains practice questions for GCE ‘O’ level topics: General Waves Properties, Reflection and Refraction Of Light, Converging Lens, Electromagnetic spectrum, Sound. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

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1. Two notes are played on a guitar. The second note is louder and has a higher pitch. The second note is

lower in both amplitude and frequency

lower in amplitude and higher in frequency

higher in amplitude and lower in frequency

higher in both amplitude and frequency

2. The distance between a compression and rarefaction in a sound wave is 0.15 m. The period of the sound wave is 0.20 milliseconds. The speed of the sound is ___________.

330 m/s

3300 m/s

1500 m/s

750 m/s

3. What is meant by the term wavefront?

a line joining points along the peak of a wave

the distance between successive peaks of a wave

a line joining the trough and the peak of a wave

the distance between the trough and the peak of a wave

4. Which of the following are always true for sound waves?

A. Sound waves are produced by vibration.

B. Sound waves are longitudinal waves.

C. Sound waves have an approximate speed of 300 m/s

A and C only

A and B only

A, B and C

B and C only

5. The air pressure at sea level is 101,325 Pa. At the centre of a rarefaction of a sound wave in air, the pressure is 91,000 Pa. Which is the most likely pressure at the centre of a compression of the same wave?

91,000 Pa

121,000 Pa

111,000 Pa

101,000 Pa

6. Which application uses microwaves?

Satellite television

Detecting small cracks in metals

Lighting a fluorescent tube

Gaining a sun-tan

7. The human eye has a converging lens system that produces an image at the back of the eye.

If the eye views a distant object, which type of image is produced?

virtual, erect, diminished

real, erect, same size

real, inverted, diminished

virtual, inverted, magnified

8. Which of the following is a possible unit for wavelength?

metre per second

kilometer

hertz

coulomb

9. We can hear sound when a ball strikes the floor because ___________.

the air particles from the floor vibrate and produce transverse waves to flow through the air into our ears.

the wavelength of the sound wave is large enough to produce the sound.

the air particles from the floor vibrate and produce longitudinal waves to flow through the air into our ears.

the air particles from the floor flowed into our ears.

10. The diagram shows an object O placed 3 cm away from a converging lens of focal length 6 cm.

What type of image is produced?

Real, erect and diminished

Virtual, inverted and diminished

Virtual, erect and magnified

Real, inverted and magnified

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