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An electrical device draws 2 kW power fr...

An electrical device draws 2 kW power from ac mains voltage 223 V(rms). The current differs lags in phase by `phi=tan^(-1)(-(3)/(4))` as compared to valtage. The resistance R in the circuit is

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An electrical device draws 2kW power from AC mains (voltage 223 V rms=sqrt 50,000 V) .The current differs (lags) in phase by phi(tan phi=-3/4) as compared to voltage. Find R. Another device has twice the values for R, X_C and X_L . How are the answers affected?

An electrical device draws 2 kW power from AC mains (voltage 223 V (rms) = sqrt50,000 V ). The current differs (lags) in phase by phi (tan phi = (-3)/4) as compared to voltage . Find i) R, ii) X_C-X_L , and iii) I_M . Another device has twice the values for R, X_C and X_L .How is the answer affected ?

An electrical device draws 2 kW power form AC mains [voltage 223 V (rms) = sqrt(50,000) V ]. The current differs (lags) in phase by phi (tan = (-3)/(4)) as compared to voltage. Find (i) R, (ii) X_(C ) - X_(L) , and (iii) I_(M) . Another device has twice the values for R, X_(C ) and X_(L) . How are the answers affected ?

An electrical device draws 2 kW power form AC mains [voltage 223 V (rms) = sqrt(50,000) V ]. The current differs (lags) in phase by phi (tan = (-3)/(4)) as compared to voltage. Find (i) R, (ii) X_(C ) - X_(L) , and (iii) I_(M) . Another device has twice the values for R, X_(C ) and X_(L) . How are the answers affected ?

An electrical device draws 2 kW power from AC mains (voltage 223V (rms) V_(rms) = sqrt(50000) V ). The current differs (lags) in phase by (tan phi=-3/4) As compared to voltage. Find (i) R, (ii) X_C - X_L , and (iii) I_M . Another device has twice the values for R, X_C and X_L . How are the answers affected ?

An electrical device draws 0.968 KW from AC mains of 220 V. If current lags voltage in phase by phi=tan^(-1)(2/3) . The value of resistance is

An electrical device draws 0.968 kW form AC mains of 220 V.If current lags voltage in phase by phi=tan^(-1)(2/3) .The value of resistance is

(a) Define Electric power. An electrial device of resistance R is connected across a source of voltage V and draws a current I. Derive an expression for power in terms of current and resistance. (b) Tow electric bulbs rated 100W , 220V and 60W, 220V are connected in parallel to an electric mains of 220V . Find the current draw by the bulbs form the mains.