The product of apparent power and cosine of the phase angle between circuit voltage and current is

Related Mcqs:

The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that

A. both waves must have same frequency B. both waves must have identical peak values C. both waves must have zero value at the same time D. none of the above...

Inductance affects the direct current flow__________?

A. only at the time of turning off B. only at the time of turning on C. at the time of turning on and off D. at all the time of operation...

In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will__________?

A. be reduced by half B. be doubled C. be four times at high D. be reduced to one fourth...

In AC. circuits, laminated iron is invariably used in order to__________?

A. reduce eddy current loss B. increase heat radiation C. make assembly cheap and easier D. reduce circuit permeability...

Time constant of a circuit is the time in seconds taken after the application of voltage to each___________?

A. 25% of maximum value B. 50% of maximum value C. 63% of maximum value D. 90% of the maximum value...