AC Fundamentals, Circuit and Circuit Theory
Inductance of coil

Is unaffected by the supply frequency
Increases with the increase in supply frequency
Becomes zero with the increase in supply frequency
Decreases with the increase in supply frequency

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AC Fundamentals, Circuit and Circuit Theory
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

The same heat as produced by A.C. when flowing through the same circuit
None of these
The more heat than produced by A.C. when flowing through the same circuit
The less heat than produced by A.C. flowing through the same circuit

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AC Fundamentals, Circuit and Circuit Theory
Time constant of a capacitive circuit

Increases with the increase of capacitance and decrease of resistance
Increases with the decrease of capacitance and decrease of resistance
Increase with increase of capacitance and increase of resistance
Increases with the decrease of capacitance and increase of resistance

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