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At t=0, an inductor of zero resistance i...

At `t=0`, an inductor of zero resistance is joined to a cell of emf `varepsilon` through a resistance. The current increases with a time constant `tau`. The emf across the coil after time `t` is

A

`varepsilont//tau`

B

`varepsilon(1-e^(-t/tau))`

C

`varepsilone^(-t//tau)`

D

`varepsilone^(-2//tau)`

Text Solution

Verified by Experts

The correct Answer is:
C
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