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A bar magnet is vibrating in a uniform magnetic induction, the magnitude of which can be changed. If the frequency is found to reduce to half of its original frequency when the magnetic induction changes to `1.25xx10^(-5)` `frac(wb)(m2)`. Calculate the original magnetic induction.

A

`5xx10^(-5)fra(wb)(m^2)`.

B

`10xx10^(-5)fra(wb)(m^2)`.

C

`15xx10^(-5)fra(wb)(m^2)`.

D

120xx10^(-5)fra(wb)(m^2)`.

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CHETANA PUBLICATION-Oscillations.-EXERCISE
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  19. When the displacement in S.H.M is one third of the amplitude, the frac...

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