The period of a sine wave is _____ seconds. Its frequency is

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The power consumed in a circuit element will be least when the phase difference between the current and voltage is__________?

A. 180″ B. 90° C. 60° D. 0°...

For a sine wave with peak value Imax the r.m.s. value is_______?

A. 0.5 Imax B. 0.707 C. 0.9 D. 1.414 Lmax...

The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces__________?

A. the more heat than produced by A.C. when flowing through the same circuit B. the same heat as produced by A.C. when flowing through the same circuit C. the less heat than produced by A.C. flowing through the same circuit D. none of the above...

Skin effect occurs when a conductor carries current at_______ frequencies

A. very low B. low C. medium D. high...

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...