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Electric Circuits

Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

 0.25.
 4.
  0.5.
  2.

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Electric Circuits
The resistivity of the conductor depends on

 none of these.
 type of material.
 length of the conductor.
 area of the conductor.

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Electric Circuits
A capacitor in a circuit became hot and ultimately exploded due to wrong connection, which type of capacitor it could be?

 Electrolytic capacitor.
 Ceramic capacitor.
 Paper capacitor.
 Any of above.

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Electric Circuits
A capacitor that stores charge of 0.5 C at 10 V has a capacitance of _____________ farad.

 10.
 0.05.
 20.
 5.

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Electric Circuits
In the above question find the angle between voltage and current?

 60.
 30.
 90.
 54.74.

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Electric Circuits
A positive and a negative charged conductor are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

 25 times larger than before.
 10 times greater than before.
 5 times greater than before.
 5 times smaller than before.

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