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The magnetic flux phi linked with a cond...

The magnetic flux `phi` linked with a conducting coil depends on time as `phi = 4t^(n) + 6`, where `n` is positive constant. The induced emf in the coil is `e`

A

If `0 lt n lt 1, e != 0` and `|e|` decreases with time.

B

If `n=1`, `e` is constant

C

If `n gt 1, |e|` increases with time.

D

If `n gt 1, |e|` decreases with time.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
`phi = 4t^(n) + 6`
`(d phi)/(dt) = 4n.t^(n-1)`
`|e| = 4n t^(n-1)`
`|e| = (4n)/(t^(1-n))`
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