Wave Motion - Equation for longitudinal waves, transverse waves, Energy density and intensity of a wave, seismic waves and gravitational waves: Link1
Wave Motion MCQ & Answers
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Q.1. What is intensity of sound?
A. it is inversely proportional to the square of the distance of point from the source.
B. it is directly proportional to the square of amplitude of vibration, square of frequency and density of the medium.
C. Both A and B
D. neither A nor B
Q.2.A body of mass 5 kg hangs from a spring and oscillates with a time period of 2π seconds. If the body is removed, the length of the spring will decrease by --------.
A. g/km
B. k/g m
C. 2π m D. g m
Q.3. In microwave ovens, water molecules in food are set into resonance when microwave of fixed frequency are incident upon them. This causes the molecules to receive energy and hence warm up the food. In order to warm up food faster, one can -------.
A. increase the frequency of the incident microwave while keeping its amplitude fixed.
B. increase the frequency and amplitude of the incident microwave.
C. increase the amplitude of the incident microwave while keeping its frequency fixed.
D. keep both frequency and amplitude of the incident microwave the same as before but increase the frequency of the water molecules.
Q.4. A swimmer floating in the water moves up and down as the waves pass by her. The distance moves up and down would be -------.
A. twice the amplitude
B. the wavelength
C. the amplitude
D. twice the wavelength
Q.5. Which of the following does not exhibit polarization?
A. longitudinal wave in a gas
B. transverse wave in a gas
C. neither A nor B
D. both A and B
Q.6. In longitudinal wave, the motion of particle is --------- the wave's direction of propagation.
A. perpendicular to
B. parallel to
C. along
D. opposite from
Q.7. A sound wave is an example of a ------ wave.
A. Rayleigh
B. interrupted
C. longitudinal
D. transverse
Q.8. The amplitude of a wave is a measure of its ------.
A. height
B. period
C. length
D. speed
Q.9. Wave speed is ------the period of a wave.
A. directly proportional to
B. smaller than
C. larger than
D. inversely proportional to
Q.10. A wave with a frequency of 1000 Hz has period of ------.
A. 0.001 sec
B. 0.0001
C. 0.01 sec
D. 0.1 sec