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In the circuit shows in Fig, the coil ha...

In the circuit shows in Fig, the coil has inductance and resistance. When `X` is joined to `Y`, the time constant is `tau` during the growth of current. When the steady state is reached, heat is produced in the coil at a rate `P`. `X` is now joined to `Z`. After joining `X` and `Z`:

A

The total heal produced in the coil is `P tau`

B

The total heat producd in the coil is `1/2 Ptau`

C

The total heat produced in the coil is `2Ptau`

D

The data given is not sufficeint to reach a conclusion

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The correct Answer is:
B
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