Waves - Multiple Choice Questions

Q1. Two points on a progressive wave are one-eighth of a wavelength apart.

The distance between them is 0.5 m, and the frequency of the oscillation is 10 Hz.

What is the minimum speed of the wave?

A
0.2 m s−1
B
10 m s−1
C
20 m s−1
D
40 m s−1

 

Q2. Which of the following waves cannot be polarised?

A
radio
B
ultrasonic
C
microwave
D
ultraviolet

 

Q3. Which of the following is correct for a stationary wave?

A
Between two nodes the amplitude of the wave is constant.
B
The two waves producing the stationary wave must always be 180° out of phase.
C
The separation of the nodes for the second harmonic is double the separation of nodes for the first harmonic.
D
Between two nodes all parts of the wave vibrate in phase.

 

Q4. Sound waves cross a boundary between two media X and Y.

The frequency of the waves in X is 400Hz.

The speed of the waves in X is 330 ms −1 and the speed of the waves in Y is 1320 ms –1 .

What are the correct frequency and wavelength in Y?

 
Frequency / Hz
Wavelength / m
A
100
0.82
B
400
0.82
C
400
3.3
D
1600
3.3