the potential difference between the terminals of an electric heater in 60V when it draws a current of 5A formed the source .what current will heater draw if the potential difference is increased to 120V
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when V=60v and I= 5Amp
R= V/I= 60/5= 12ohms
the resistance of the heater is never change
when V= 120v and R=12ohms
I= V/R= 120/12= 10Amp
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