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Switch S is closed t=0, in the circuit s...

Switch `S` is closed `t=0`, in the circuit shown. The change in flux in the inductor `(L=500mH)` from `t=0` to an instant when it reaches steady state is

A

`2Wb`

B

`1.5Wb`

C

`0Wb`

D

None

Text Solution

Verified by Experts

The correct Answer is:
B
Current through the inductor before closing the switch `=10//(%+%)=1A`
Current through the inductor after closing the switch (in steady state)`I=20/5=4A`
`:. Delta phi=L(Delta)I=1.5Wb`.
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