A magnetic needle of magnetic moment M-0-05 A- m2 and moment of inertia of 7- 10-6 kg m2 is oscillating in a magnetic field of 1G- Time taken for 20 oscillation is-

The correct option is C 14.86 sSolutionWe know,Time period (T)= 2π√(IMB) T= 2π√(7× 10^ 6(0.05)(10^ 2))= 0.743s Time taken for 20 oscillation = ...

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A magnetic needle of magnetic moment $M = 0.05$ A- $m^{2}$ and moment of inertia of $7 \times 10^{- 6}$ kg $m^{2}$ is oscillating in a magnetic field of $1$ G. Time taken for $20$ oscillation is?

24.86

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248.6

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14.86

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148.6

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