The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of____________?

Related Mcqs:

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

A. 20 Hz B. 30 Hz C. 40 Hz D. 50 Hz...

If two sine waves of the same frequency have a phase difference of JT radians, then_______?

A. both will reach their minimum values at the same instant B. both will reach their maximum values at the same instant C. when one wave reaches its maxi¬mum value, the other will reach its minimum value D. none of the above...

Time constant of an inductive circuit___________?

A. increases with increase of inductance and decrease of resistance B. increases with the increase of inductance and the increase of resistance C. increases with decrease of inductance and decrease of resistance D. increases with decrease of inductance and increase of resistance...

When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?

A. apparent power B. true power C. reactive power D. none of the above...

A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to_________?

A. the big size of the inductor B. the reactance of the inductor C. the current flowing in the inductor D. the statement given is false...