Progressive waves Quiz
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5 questions, one answer each
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1. A wave has a period of 0.020 s. What is its frequency?
- A. 0.020 Hz
- B. 20 Hz
- C. 50 Hz
- D. 500 Hz
2. Sound waves of frequency 440 Hz travel at 340 m s⁻¹. What is their wavelength?
- A. 1.3 m
- B. 150 000 m
- C. 0.0013 m
- D. 0.77 m
3. Two points on a wave are separated by 1.5 wavelengths. What is their phase relationship?
- A. Antiphase (a phase difference of π rad, or 3π rad)
- B. In phase
- C. A phase difference of 3π/2 rad
- D. A phase difference of 0.75 rad
4. The amplitude of a water wave is 2.0 cm. What is the vertical distance from a trough to the next crest?
- A. 2.0 cm
- B. 4.0 cm
- C. 1.0 cm
- D. 8.0 cm
5. A wave on a string travels at 12 m s⁻¹. The vibrator frequency is doubled and the tension is unchanged. What happens?
- A. The wave speed doubles and the wavelength is unchanged
- B. The wave speed halves and the wavelength is unchanged
- C. The wave speed is unchanged and the wavelength halves
- D. The wave speed and the wavelength both double