Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The voltage drop across R is

 24.4 V .
  50.8 V.
 40.8 V.
  30.6 V.

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Electric Circuits
What is time period T?

 Time taken by an alternating quantity to complete one full cycle.
 Time taken by an alternating quantity to complete the (-)ve half.
 Time taken by an alternating quantity to reach the peak value.
 Time taken by an alternating quantity to complete the (+)ve half.

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Electric Circuits
The voltage induced in an inductor is represented as,

 product of its inductance and current through it.
 product of its inductance and rate of change of current through it.
 ratio of its inductance to current through it.
 ratio of current through it to its inductance.

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