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Electric Circuits

Electric Circuits
The capacity of a cell is measured in

  watt-hours.
  amperes.
  watts.
  ampere-hour.

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Electric Circuits
Capacitors for P.f correction are rated in

 KVA.
 KVAR.
 KV.
 KW.

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Electric Circuits
Among the options which metal has the highest electrical conductivity?

 Steel.
 Aluminium.
 Stranded aluminium.
 Copper.

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Electric Circuits
A parallel plate capacitor with air as dielectric, force between plate is F. If capacitor is now immersed water of dielectric εr, force between plate will be –

 εr/F.
 F εr.
 0.
 F.

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Electric Circuits
Internal resistance of ideal voltage source is

 infinite
 finite
 zero
 100 ohms

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Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 60.
 105.
 75.
 15.

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