The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. Whatcurrent will the heater draw, if the potential difference is increased to 120V ?

The potential difference between the terminals of an electric heater i

1.	The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. Whatcurrent will the heater draw, if the potential difference is increased to 120V ?
Answer» Solution :We are given, potential differenceV = 60 V. current 1= 4 A. According to the Ohm.s law, resistance of HEATER coil `R = V/I =(60V)/(4A) =15 Omega.` When the potential difference is increased to 120V the current is given by current `= V/R =(120V)/(15OMEGA)= 8A`. THUS, the current through the heater becomes 8A.