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Question

A loop (circuit) is placed in uniform B and flux through the loop is given by ϕ=4t. Find the power supplied to the 6 V battery.

A
6 Watt
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B
2 Watt
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C
3 Watt
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D
5 Watt
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Solution

The correct option is A 6 Watt
Emf induced, E=dϕdt=4 V.

Because the flux is increasing into the paper, the current will be in anticlockwise direction.

Hence, the total emf is =8+46=6 V in the anticlockwise direction.

So, I=64+2=1 A.

Current is pumped into the battery, so power is supplied to the battery, and it is equal to,
Power =VI=6(1)=6 W

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