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An e.m.f. e = 4 cos 1000 t volt is appli...

An e.m.f. e = 4 cos 1000 t volt is applied to LR circuit of inductance 3 mH and resistance `4 Omega`. The amplitude of current in the circuit is

A

`8 A`

B

`4 A`

C

`0.8 A`

D

`0.4 A`

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