Oscillations and Waves: JEE Main 2012 Physics question

JEE Main 2012 · Annual, Paper 1 · Q8115

JEE Main 2012Annual, Paper 1PhysicsMediumOscillations and Waves185× since 2002

If a simple pendulum has significant amplitude (up to a factor of

1/e

of original ) only in the period between

t = 0s\,\,to\,\,t = \tau \,s,

then

\tau \,

may be called the average life of the pendulum When the spherical bob of the pendulum suffers a retardation (due to viscous drag) proportional to its velocity with

b

as the constant of proportionality, the average life time of the pendulum is (assuming damping is small) in seconds :

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JEE Main 2012 Oscillations and Waves Question with Solution (Annual Paper 1, Q8115) | JEE Arc