Electric Circuits
A variable capacitance is one whose capacitance

 changes with temperature.
 changes with time.
 changes with voltage.
 can be changed manually or by mechanical force.

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Electric Circuits
What is time period T?

 Time taken by an alternating quantity to complete the (-)ve half.
 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.

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