Unit 12: Waves

1

Tsunamis are caused mainly by:

A Strong winds B Heavy rainfall C Undersea earthquakes D Volcanic ash

2

Diffraction of waves is most noticeable when:

A Wavelength is very small B Wavelength is comparable to obstacle size C Amplitude is large D Frequency is high

3

Mechanical waves require:

A Vacuum B Medium C Electric field D Magnetic field

4

Seismic waves that travel through the Earth's interior are called:

A Surface waves B Water waves C Body waves D Electromagnetic waves

5

The distance between two successive crests is called:

A Amplitude B Frequency C Wavelength D Time period

6

Sound waves are:

A Transverse waves B Electromagnetic waves C Longitudinal waves D Surface waves

7

The wavelength of a tsunami in deep water is:

A Very small B Moderate C Very large D Zero

8

Destructive interference results in:

A Maximum displacement B Minimum displacement C Increase in frequency D Increase in wavelength

9

Which wave can travel through vacuum?

A Sound wave B Water wave C Electromagnetic wave D Seismic wave

10

Which wave phenomenon explains bending of waves around obstacles?

A Reflection B Refraction C Diffraction D Interference

11

Wave motion is the transfer of:

A Matter only B Energy only C Both matter and energy D Neither matter nor energy

12

Which quantity is measured in meters?

A Frequency B Amplitude C Time period D Wave speed

13

In wave motion, the particles of the medium:

A Move along with the wave B Remain completely at rest C Vibrate about their mean positions D Move in circular paths

14

Reflection of waves occurs when waves:

A Change medium B Hit a barrier C Increase frequency D Decrease speed

15

Crests and troughs are found in:

A Longitudinal waves B Sound waves C Transverse waves D Compression waves

16

Which type of wave requires a material medium?

A Electromagnetic wave B Mechanical wave C Light wave D Radio wave

17

As a tsunami approaches the shore, its speed:

A Increases B Remains constant C Decreases D Becomes zero

18

Which property of waves depends on energy?

A Frequency B Amplitude C Wavelength D Time period

19

As a tsunami reaches shallow water, its height:

A Decreases B Remains same C Increases D Becomes zero

20

Energy carried by a wave is proportional to:

A Frequency B Wavelength C Amplitude squared D Wave speed

21

The primary waves in earthquakes are:

A Transverse waves B Surface waves C Longitudinal waves D Electromagnetic waves

22

Compressions and rarefactions are characteristics of:

A Light waves B Transverse waves C Longitudinal waves D Surface waves

23

Antinodes in a standing wave are points of:

A Zero displacement B Minimum energy C Maximum displacement D No vibration

24

Which of the following is a mechanical wave?

A Light wave B Sound wave C Radio wave D X-ray

25

The unit of wave speed is:

A m B m/s C Hz D s