In the circuit shown in the figure, the jockey J is being pulled towards right, so that the resistance in the circuit is increasing. It’s a value at some instant is `5Omega`. The current in the circuit at this instant will be

Options

A. `4A`
B. less than 4 A
C. more than 4A
D. may be less than or more than 4 A depending on the value of L

Answer

C

Explanation

Since, yor are decreasing current in the circuit by increasing resistance of the circuit.
Induced emf across inductor will support 20 V battery.
Hence, net emf of the circuit is greater than 20 V or current in the circuit is more than 4 A.