1.

Two coils A and B have mutual inductance `2xx10^(2)` henry if the current in he primary is i=5 sin `10^(pi)` t then the maximum value of emf induced in coil B isA. `pi` voltB. `(pi)/(2)` voltC. `(pi)/(3)` voltD. `(pi)/(4)` volt

Answer» Correct Answer - c
`M=2xx10^(-2)H` and `i=5 sin 10pi` t
induced emf `e_(B)=-M(dL_(A))/(dt)`
where `e_(B)` =emf in coil B
`e_(B)=-2xx10^(-2)(d)/(dt)[5 som 10pi t]`
`e_(B)=-pi[cos 10 pi t]`
The maximum value of emf induced in coil `B=pi V`


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