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Q.

Is it true that the resistance of a conductor decreases when a heavy current passes through it?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
The electrons in a conductor are in continuous motion. It is quite a random motion, so when current is passed through a conductor, the electrons start moving in one direction. If a heavy current is passed through the conductor, more electrons will start moving in one direction while decreasing the resistance of the conductor.
 
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Is it true that the resistance of a conductor decreases when a heavy current passes through it?