A coil has an inductance of and a resistance of

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Induction · Electromagnetic Induction

Problem

A coil has an inductance of

50\text{ mH}

and a resistance of

0.3\ \Omega

. If a

12\text{ V}

emf is applied across the coil, the energy stored in the magnetic field after the current has built up to its steady-state value is (a)

40\text{ J}

(b)

40\text{ mJ}

(c)

20\text{ J}

(d)

20\text{ mJ}