when a battery is connected across a 4.8 kilo-ohms resistor , there is a current of 2.5mA on the circuit . find the emf of the battery
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Explanation:
State how resistance of a conductor is affected when (i) a low current passes through it for a short duration; (ii) a heavy current passes through it for about 30 seconds. ... We know that current is inversely proportional to resistance. i.e. greater the current less is the resistance and vice versa.
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