## WAVES AND MOTIONS MCQs

### Laws Of Motion, Second Law Motion, Uniform Circular Motion, First Law Of Motion, Third Law Motion, Horizontal Projectile Motion, Oscillations And Waves, Radio Wave Propagation, Wave Optics

Total Questions : 131 | Page 1 of 14 pages
Question 1. An object attached to one end of a spring makes 20 complete vibrations in 10s
1.    0.50 s
2.    2 s
3.    0.5 Hz
4.    2 Hz
Answer: Option A. -> 0.50 s
Question 2. In simple harmonic motion (SHM), the displacement x(t) of a particle from its equilibrium position is described by the equation of?
1.    x = xm cos(ωt - 2ϕ)
2.    x = xm cos(ωt + 2ϕ)
3.    x = xm cos(ωt + ϕ)
4.    x = xm cos(2ωt + ϕ)
Answer: Option C. -> x = xm cos(ωt + ϕ)
Question 3. A pendulum has a time period of 0
1.    0.4 Hz
2.    1.0 Hz
3.    2.5 Hz
4.    4.0 Hz
Answer: Option C. -> 2.5 Hz
Question 4. There are two properties of sound waves, they are:
1.    Pitch
2.    Loudness
3.    Vibration
4.    Both A & B
Answer: Option D. -> Both A & B
Question 5. A pendulum swings 5 times in a second
1.    0.2 s
2.    0.5 s
3.    1.0 s
4.    5.0 s
Answer: Option A. -> 0.2 s
Question 6. A violin string could vibrate with frequency of 1 kHz
1.    1000 s
2.    10 s
3.    0.1 s
4.    0.001 s
Answer: Option D. -> 0.001 s
Question 7. A change of amplitude will change:
1.    the wavelength
2.    the loudness
3.    the frequency
4.    the pitch
Answer: Option B. -> the loudness
Question 8. Jason heard a thunder 2 seconds after he saw the lightning
1.    600 m
2.    302 m
3.    300 m
4.    150 m
Answer: Option A. -> 600 m
Question 9. The period T is the time required for one complete oscillation or cycle, It is related to the frequency by?
1.    T=2/F
2.    T=1/F
3.    T=3/F
4.    T=4/F
Question 10. A sound wave has a frequency of 50 Hz
1.    16.7 m/s
2.    60 m/s
3.    75 m/s
4.    150 m/s
Answer: Option D. -> 150 m/s