Ncert Exercises & Solutions

An electrical device draws 2 kW power from AC mains (voltage 223 V (RMS)= $\sqrt{50000}$ V). The current differs (lags) in phase by $ϕ (tanϕ = \frac{- 3}{4})$ as compared to voltage. Find (a) R, (b) $X_{C} - X_{L}$ (c) $I_{M}$ . Another device has twice the values for $R, X_{C} and X_{L}$ . How are the answers affected?