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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.

  1. 6 Watt
  2. 2 Watt
  3. 3 Watt
  4. 5 Watt


Solution

The correct option is A 6 Watt
Emf 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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