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

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

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AC Fundamentals, Circuit and Circuit Theory
An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms,

None of the listed here
The current through the resistance is more
The current through the resistance is less
Both resistance and inductance carry equal currents

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AC Fundamentals, Circuit and Circuit Theory
Pure inductive circuit

Takes power from the line during some part of the cycle and then returns back to it during other part of the cycle
Does not take power at all from a line
Consumes some power on average
None of the listed here

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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

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

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