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

 temperature of electrolyte.
 level of electrolyte.
 colour of electrolyte.
 specific gravity 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 one full cycle.
 Time taken by an alternating quantity to complete the (+)ve half.

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