The potential difference between the terminals of an electric heater is 60V when it draws current of 4A from thesource.What current will the heater draw if the potential difference is increased to 120V ?
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Answer:
Current= 8A
Explanation:
firstly we have to calculate resistance of this heater.
so, R= V/I = 60/4 =15 ohm
now if potential difference is 120V then,
I = V/R = 120/15 = 8A
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