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Electric Circuits

Electric Circuits
An equipotential surface is one which has all points at _____________ potential.

 different.
 same.
 none of them.
 zero.

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Electric Circuits
A wire of 0.14 mm diameter and specific resistance 9.6 Ω - cm is 440 cm long. The resistance of the wire will be

 13.7 Ω.
 11.3 Ω.
 27.4 Ω.
 9.6 Ω.

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Electric Circuits
Four capacitors each of 40 µF are connected in parallel, the equivalent capacitance of the system will be

 40 µF
 10 µF
 160 µF
 5 µF

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Electric Circuits
Which material has extremely large resistance?

 Conductor
None of these
 Insulator
 Semiconductor

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Electric Circuits
Four resistances 80 Ohm, 50 Ohm, 25 Ohm and R are connected in parallel. Current through 25 Ohm resistance is 4A. Total current of supply is 10A. The value of R will be

 76.66.
 36.36.
 40.25.
 66.66.

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Electric Circuits
Which battery is used in aeroplanes?

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

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