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Q.

Keeping the potential difference constant, the resistance of a circuit is halved. The current will become


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a

One-fourth

b

Four times

c

Half

d

Double  

answer is D.

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Detailed Solution

The current will become doubled.
The current will become double. As the resistance of a conductor is inversely proportional to the current.
Resistance  R ∝ 1current
If the resistance of the circuit is doubled, then the current will become half. A substance with very low electrical resistance is a good conductor of electricity, whereas a substance with high resistance is a bad conductor of electricity.
 
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