A coil of resistance 20 ohms and inductance 5 H has been connected to a 100 volts battery. The energ

Question

A coil of resistance 20 ohms and inductance 5 H has been connected to a 100 volts battery. The energy stored in the coil is\

Professor PC Thomas Classes · Answer

Current $\mathrm{I}=\frac{\varepsilon}{\mathrm{R}}=\frac{100 \mathrm{~V}}{20 \Omega}=5 \mathrm{~A}$ Energy $=\frac{1}{2} \mathrm{LI}^{2}=\frac{1}{2} 	imes 5 	imes 5^{2}=\mathrm{J}$\