In which type of wave do the particles of the medium vibrate parallel to the direction of propagation, forming compressions and rarefactions?
Correct answer D. Longitudinal waves
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Waves MCQs
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Which of the following waves cannot be polarised?
Correct answer B. Sound waves in air
What is transferred from one place to another by a progressive wave?
Correct answer D. Energy, without net transfer of the medium
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If the amplitude of a progressive wave is doubled while its frequency is unchanged, the energy it carries per second becomes ____.
Correct answer A. four times as great
A wave has a period of 0.020 s and a wavelength of 2.0 m. What is its speed?
Correct answer C. 100 m/s
In a transverse wave, the distance between a crest and the adjacent trough is 0.25 m and the frequency is 40 Hz. What is the wave speed?
Correct answer A. 20 m/s
A radio station broadcasts at 100 MHz. What is the wavelength of its waves (speed of light = 3.0 × 10⁸ m/s)?
Correct answer C. 3.0 m
Which of the following waves can travel through a vacuum?
Correct answer A. Light waves
A sound wave of frequency 500 Hz has a wavelength of 0.68 m in air. What is its speed?
Correct answer D. 340 m/s
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Which of the following is a mechanical wave?
Correct answer A. Ultrasound