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

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In a series resonant circuit, the impedance of the circuit is___________?

A. minimum B. maximum C. zero D. none of the above...

Pure inductive circuit____________?

A. consumes some power on average B. does not take power at all from a line C. takes power from the line during some part of the cycle and then returns back to it during other part of the cycle D. none of the above...

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...