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Question

# A loop (circuit) is placed in uniform →B & flux through the loop is given by ϕ=4t. Find the power supplied to the 6 volt 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 WattEmf induced = dϕdt=4 volt. Because the flux is increasing into the paper, the current will be in anticlockwise direction. Hence, the total emf is = 8+4-6 = 6 volt in the anticlockwise direction. I=64+2=1 Amp. Current is pumped into the battery, so power is supplied to the battery, and it is equal to, Power = V. i = 6(1) = 6 Watt

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