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10th Grade > Physics

SIMPLE HARMONIC MOTION AND WAVES MCQs

Total Questions : 97 | Page 7 of 10 pages
Question 61. At one end of a ripple tank 90 cm across, a 6Hz vibrator produces waves whose wavelength is 30 mm. The time needed to cross the waves is
  1.    3 seconds
  2.    7 seconds
  3.    10 seconds
  4.    5 seconds
 Discuss Question
Answer: Option D. -> 5 seconds
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 62. The motion of ceiling fan
  1.    is SHM
  2.    isn't SHM
  3.    Linear
  4.    quadratic
 Discuss Question
Answer: Option B. -> isn't SHM
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 63. If the length of a simple pendulum is doubled then its time will be
  1.    2.8π√(l⁄g)
  2.    2π√g
  3.    4π√(l⁄g)
  4.    tripled
 Discuss Question
Answer: Option A. -> 2.8π√(l⁄g)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 64. A simple pendulum completes one vibration in 3 seconds. When g = 10 ms-2, its length will be
  1.    1.5 m
  2.    2 m
  3.    3.2 m
  4.    2.28 m
 Discuss Question
Answer: Option D. -> 2.28 m
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 65. According to Hooke's law, the force is directly proportional to change in
  1.    length
  2.    area
  3.    volume
  4.    mass
 Discuss Question
Answer: Option A. -> length
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 66. The expression for Hooke's law is
  1.    F = ma
  2.    F = -kx
  3.    F = vl
  4.    F = m1m2
 Discuss Question
Answer: Option B. -> F = -kx
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 67. One complete round trip of a vibrating body about its mean position is
  1.    frequency
  2.    time period
  3.    amplitude
  4.    vibration
 Discuss Question
Answer: Option D. -> vibration
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 68. If speed of radio wave is 4×10⁸ms-¹, where 1M = 10⁶. The wavelength of the radio waves transmitted at 80Mhz will be
  1.    6 m
  2.    10 m
  3.    8 m
  4.    5 m
 Discuss Question
Answer: Option D. -> 5 m
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 69. Heatwaves are
  1.    electromagnetic
  2.    mechanical
  3.    transverse
  4.    chemical waves
 Discuss Question
Answer: Option B. -> mechanical
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 70. An example of the simple harmonic motion is the
  1.    motion of simple pendulum
  2.    motion of ceiling fan
  3.    bouncing ball on floor
  4.    spinning of Earth on its axis
 Discuss Question
Answer: Option A. -> motion of simple pendulum
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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