A.C Fundamentals, Circuits And Circuit Theory Set 4

The current is in phase with the voltage ✘ The current lags behind the voltage by 90° ✘ The current leads the voltage by 90° ✘ The current can lead or lag by 90° ✔

Current lags behind the voltage by 90° ✘ Current leads the voltage by 90° ✘ Current can lead or lag the voltage by 90° ✘ Current is in phase with the voltage ✔

kW ✘ kVA ✘ kV ✘ kVAR ✔

180° ✘ 90° ✘ 60° ✘ 0° ✔

Can dissipate considerable amount of power ✘ Can act as energy storage devices ✘ Connecting them in parallel increases the total value ✘ Oppose sudden changes in voltage ✔

Current is maximum ✘ Current is minimum ✘ Impedance is maximum ✘ Voltage across C is minimum ✔

C only ✘ L only ✘ R only ✘ All above ✔

Very near to inductive load ✘ Across the terminals of the inductive load ✘ Far away from the inductive load ✘ Any where ✔

Ratio of net reactance and impedance ✘ Ratio of kW and kVA ✘ Ratio of J and Z ✘ Ratio of W and VA ✔

The speed with which the alternator runs ✘ The number of cycles generated in one minute ✘ The number of waves passing through a point in one second ✘ The number of electrons passing through a point in one second ✔