The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V?
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Given :-
Potential energy of electric heater, V = 60V.
Current of electric heater, I = 4A.
To find :-
The current through the heater.
Solution :-
using ohms law, .i.e.,
The potential difference, V across the ends of the given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided it's temperature remains constant the same.
In other words,
When the potential difference is increased to 120V. The current is given by,
Thus, the current through the heater becomes 8A.
#sanvi....
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