Question

A loop (circuit) is placed in uniform $\overrightarrow{B}$ & flux through the loop is given by $\varphi =4t$. Find the power supplied to the 6 volt battery.

• A. 6 Watt
• B. 2 Watt
• C. 3 Watt
• D. 5 Watt

Answer 1

The correct option is A 6 Watt

Emf induced = $\frac{d\varphi }{dt}=4$ 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.
$I=\frac{6}{4+2}=1$ 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