a. State how resistance of a conductor is affected when low current passes through it for short duration. b) a heavy current passes through it for 30 seconds

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Solution

We know that from ohm's law the current is inversely proportional to resistance i.e. greater the current less is the resistance and vice versa. Therefore,
(i) when a low current passes through it for a short duration the resistance of a conductor will increase.
(ii) when a high current passes through it the resistance of a conductor will decrease.

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