Question 1

What is the phase difference between two points 0.16 m apart on a progressive sound wave of frequency 256 Hz?

speed of sound = 330 m s–1

8π​
6π​
4π​
3π​

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Question 2

Which statement is not correct for ultrasound and X-rays?

  A  

both can be refracted

  B  

both can be diffracted

  C  

both can be polarised

  D  

both can be reflected

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Question 3

A progressive wave travels along a rope in the direction M to N.

X marks a point on the rope.

The wave has a frequency of 5.0 Hz, a wavelength of 1.0 m and an amplitude of 0.20 m.

Where will X be after 0.15 s?

  A  

below MN by 0.20 m


  B  

above MN by 0.20 m


  C  

nearer N by 0.15 m


  D  

nearer N by 0.75 m


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Question 4

A sonar transmitter on a ship produces pulses of sound waves.

Each pulse of sound waves contains 12 complete oscillations.

The frequency of these waves is 8.0 kHz and the speed of sound in seawater is 1.5 × 103 m s–1.

What is the length of one pulse in seawater?

  A  

0.188 m

  B  

2.25 m

  C  

2.25 × 103 m

  D  

1.44 × 105 m

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Question 5

Which gives the regions of the electromagnetic spectrum in order of increasing wavelength?

  A  

X-rays, ultraviolet, infrared, radio waves

  B  

X-rays, microwaves, ultraviolet, infrared

  C  

infrared, radio waves, microwaves, X-rays

  D  

microwaves, infrared, ultraviolet, X-rays

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Question 6

Two points on a progressive wave have a phase difference of π6\frac{\pi}{6}rad.

The speed of the wave is 340 m s−1

What is the frequency of the wave when the minimum distance between the two points is 0.12 m?

  A  

240 Hz

  B  

470 Hz

  C  

1400 Hz

  D  

2800 Hz

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