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If the coefficient of mutual induction of primary and secondry of an induction coil is 6H and a current of 5A is cut-off in `2xx10^(-4)`s, the induced emf in secondary coil is

A

`1.5xx10^(5)V`

B

6V

C

`1.5xx10^(-4)V`

D

`2.3xx10^(2)V`

Text Solution

Verified by Experts

The correct Answer is:
A
It is given that dt =5A,
`dt=2xx10^(-4)s, M=6H`,
`:.` the induced emf is e `=M(dI)/(dt)`
`=6xx(5)/(2xx10^(-4))=1.5xx10^(5)V`
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