Question

A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 V battery. The energy stored in the coil is?

• A. 125 erg
• B. 250 erg
• C. 280 erg
• D. 250 J

Hint:

The energy stored in an inductor depends on the current flowing through it and its inductance.

Answer 1

The Correct Option is D

The energy stored in an inductor is given by the formula: \[ E = \frac{1}{2} L I^2 \] Where \( L \) is the inductance and \( I \) is the current. First, calculate the current using Ohm's law, and then use it to find the energy stored in the inductor.