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In the circuit shows Fig the cell is ide...

In the circuit shows Fig the cell is ideal. The coil has an inductance of `4 H` and zero resistance. `F` is a fuse of zero resistance and will blow when the current through it reaches `5 H`. The switch is closed at `t= 0`. The fuse will blow

A

almost at once

B

after `2 s`

C

after `5 s`

D

after `10 s`

Text Solution

Verified by Experts

The correct Answer is:
D
`E = L(dI)/(dt)` or `dI = (E)/(L) dt`
or `I = (2)/(4) t =0.5 t rArr t = 2I = 2 xx 5 = 10 s`
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