AC Fundamentals, Circuit and Circuit Theory
A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to

The big size of the inductor
The current flowing in the inductor
The statement given is false
The reactance of the inductor

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

Both waves must have identical peak values
None of the listed here
Both waves must have zero value at the same time
Both waves must have same frequency

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AC Fundamentals, Circuit and Circuit Theory
Time constant of an inductive circuit

Increases with the decrease of inductance and decrease of resistance
Increases with the increase of inductance and the increase of resistance
Increases with decrease of inductance and increase of resistance
Increases with increase of inductance and decrease of resistance

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