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Earn 100

In case of forced oscillation; the resonance peak becomes very sharp when the
(a)Amplification is small
(b)damping force is small
(c)restring force is small
(d)Quality factor is small

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Important Questions on Simple Harmonic Motion
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HARD

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The amplitude of a simple pendulum, oscillating in air with a small spherical bob, decreases from 10 cm to 8 cm in 40 seconds. Assuming that Stokes law is valid, and ratio of the coefficient of viscosity of air to that of carbon dioxide is 1.3, the time in which amplitude of this pendulum will reduce from 10 cm to 5 cm in carbondioxide will be close to (ln 5 = 1.601, ln 2 = 0.693).

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(Where acceleration due to gravity)

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Two pendulums and are suspended from a wire as shown in the given figure. Pendulum is made to oscillate by displacing it from its mean position. It is seen that also starts oscillating. Name the type of oscillation, will execute.

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In an experiment to determine the gravitational acceleration of a place with the help of a simple pendulum, the measured time period squared is plotted against the string length of the pendulum in the figure. What is the value of at the place?

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