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Waves Questions and Answers | Waves Multiple Choice Questions and Answers

(1) Which of the following is also known as pressure waves?
[A] Transverse waves
[B] Longitudinal waves
[C] Mechanical waves
[D] Stationary waves
Answer: Longitudinal waves
(2) In which medium sound travels faster?
[A] Solid
[B] Liquid
[B] Gas
[B] Water vapour
Answer: Solid

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(3) The distance traveled by a wave in one period is called?
[A] Frequency
[B] Period
[C] Speed of wave
[D] Wavelength
Answer: Wavelength
(4) Which of the following is the speed of a wave traveling with a wavelength λ, frequency f, and period T?
[A] v = λ/f
[B] v =f/λ
[C] v = λ·f
[D] v = f·T
Answer: v = λ·f
(5) The frequency of a wave is doubled when the wavelength remains the same. What happens to the speed of the wave?
[A] It doubles
[B] It quadruples
[C] Remains unchanged
[D] It is cut to one-half
Answer: It doubles
(6) The frequency of a wave increases when the speed remains the same. What happens to the distance between two consecutive crests?
[A] It increases
[B] It decreases
[C] Stays unchanged
[D] It increases first and then decreases
Answer: It decreases
(7) Which of the following statements is true about transverse waves?
[A] They always have the same frequencies
[B] They always have the same velocities
[C] They always have the same wavelengths
[D] The particles vibrate in perpendicular direction with respect to the wave motion
Answer: The particles vibrate in perpendicular direction with respect to the wave motion
(8) Which of the following statements is true about longitudinal waves?
[A] They always have the same frequencies
[B] They always have the same velocities
[C] They always have the same wavelengths
[D] The particles vibrate along the same direction as the wave motion
Answer: The particles vibrate along the same direction as the wave motion
(9) A wave travels on a string of length L, linear density µ, and tension T. Which of the following is true?
[A] The wave speed is inversely proportional to the tension T
[B] The wave speed is directly proportional the linear density µ
[B] The wave speed increases with increasing tension T
[B] The wave speed increases with increasing linear density
Answer: The wave speed increases with increasing tension T
(10) A wave pulse travels a long a thin part of a horizontal cord and reaches another part of the cord which is much thicker and heavier. Which of the following is true about the reflected and transmitted pulse by the boundary in the cord?

[A] A. Upright Upright
[B] B. Inverted Inverted
[C] C. Upright Inverted
[D] D. Inverted Upright
Answer: D. Inverted Upright

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