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ELECTRIC CIRCUITS

Electric Circuits
A constant voltage source has

 minimum current capacity.
 high internal resistance.
 minimum efficiency.
 low internal resistance.

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Electric Circuits
Which battery is used in aeroplanes?

 Dry cell battery.
 None of them.
 Edission cell.
 Lead acid battery.

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Electric Circuits
The current in a chemical cell is a movement of

  negative ions only.
  positive ions only.
 positive hole charges.
  positive and negative ions.

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Electric Circuits
The greater the internal resistance of a cell

 the greater the terminal voltage.
 the greater the emf.
 the lesser the terminal voltage.
 the lesser the emf.

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Electric Circuits
A external resistance R is connected to a cell of internal resistance r, then the current is maximum when

 R = r.
 R < r.
None of these
 R > r.

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