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- 1. Multiple Choice
The diagram shows two sinusoidal waveforms.
At time t = 0 the waves are in phase. At the dotted line, t = 18 s.
At which time is the phase difference between the two oscillations ⅛ of a cycle?
8.0s
4.5s
4.0s
9.0s
- 2. Multiple Choice
A signal has a frequency of 2.0 MHz.What is the period of the signal?
5μs
200ns
500ns
2μs
- 3. Multiple Choice
A displacement-time graph for a transverse wave is shown in the diagram.
The phase difference between X and Y can be expressed as nπ.
What is the value of n?
3.0
1.5
2.5
6.0
- 4. Multiple Choice
The frequency of a certain wave is 500 Hz and its speed is 340 ms–1.What is the phase difference between the motions of two points on the wave 0.17 m apart?
π rad
π/4 rad
π/2 rad
3π/4 rad
- 5. Multiple Choice
Noise reduction headphones actively produce their own sound waves in order to cancel out external sound waves.
A microphone in the headphones receives waves of one frequency. A loudspeaker in the headphones then produces a wave of that frequency but of a different phase.
What is the phase difference between the external sound wave and the wave produced by the loudspeaker in the headphones?
360°
180°
90°
270°
- 6. Multiple Choice
What is the phase difference between two points 30cm apart if the wavelength is 1.5m?
1.26 rad
126 rad
1.25663 rad
31 rad
- 7. Multiple Choice
What is the phase difference between points O and D?
zero
2π
π
π/2
- 8. Fill in the Blank
If the path difference between B and C is 8nm, what is the wavelength?
- 9. Multiple Choice
A wave is displaced forward by +6 radians from O. Select which two points are closest to it
F
B
C
D
E
- 10. Open Ended
Describe the difference between longitudinal and transverse waves.
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