Question

An LR circuit with a battery is connected at t=0. Which of the following quantities is not zero just after the connection?
A. current in the circuit
B. magnetic field energy in the inductor
C. power delivered by the battery
D. `emf` induced in the inductor

Answer 1

Correct Answer - A::B::C
`EMF` induced =`-L(di)/(dt) != 0`, rest quantities are zero.