NEET Physics Oscillations MCQs Set A

Question.  Motion of an oscillating liquid column in a U-tube is
(a) simple harmonic and time period is independent of the density of the liquid
(b) simple harmonic and time period is directly proportional to the density of the liquid
(c) non-periodic
(d) periodic but not simple harmonic

Answer: A

Question.  Resonance is an example of
(a) forced vibration
(b) damped vibration
(c) tuning fork
(d) free vibration

Answer: A

Question.
Assertion : If the amplitude of a simple harmonic oscillator is doubled, its total energy becomes four times.
 Reason : The total energy is directly proportional to the square of the amplitude of vibration of the harmonicoscillator
(a) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(b) Assertion is correct, reason is incorrect
(c) Assertion is incorrect, reason is correct
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Answer: A

Question.  A silver atom in a solid oscillates in simple harmonic motion in some direction with a frequency of 10¹²/sec. What is the force constant of the bonds connecting one atom with the other? (Mole wt. of silver = 10⁸ and Avagadro number = 6.02 ×10²³ gm mole ^–1) 
(a) 7.1 N/m
(b) 2.2 N/m
(c) 5.5 N/m
(d) 6.4 N/m

Answer: A

Question.  Two simple pendulums of length 0.5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will again be in the phase when the pendulum of shorter length has completed oscillations [nT₁=(n–1)T₂, where T₁ is time period of shorter length & T₂ be time period of longer wavelength and n are no. of oscillations completed]
(a) 1
(b) 5
(c) 2
(d) 3

Answer: A

Question.  In an engine the piston undergoes vertical simple harmonic motion with amplitude 7 cm. A washer rests on top of the piston and moves with it. The motor speed is slowly increased. The frequency of the piston at which the washer no longer stays in contact with the piston, is close to
(a) 1.9 Hz
(b) 1.2 Hz
(c) 0.1 Hz
(d) 0.7 Hz

Answer: A