Find the Equation for the Current $\mathrm{i}$ In a Series Circuit with Inductance

Short Answer

Find the equation for the current $\mathrm{i}$ in a series circuit with inductance $\mathrm{L}=0.2 \mathrm{H}$ , resistance $\mathrm{R}=120 \Omega$ , and voltage $\mathrm{V}=210$ volts if the initial current $\mathrm{i}_{0}=5$ amperes when $\mathrm{t}=0$ . (Hint: Use $\mathrm{L} \frac{\mathrm{di}}{\mathrm{dt}}+\mathrm{Ri}=\mathrm{V}$ .)