Electric Circuits
The indication of the state of charge of a battery is best given by

 temperature of electrolyte.
 level of electrolyte.
 specific gravity of electrolyte.
 colour of electrolyte.

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

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