. The potential difference between the terminals of an electric heater is 30 volt when it draws current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 volt?
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potential difference 30 volt
current 4A
R=V/I
R=30/4=7.5 ohm
potential difference 120 volt
resistance 7.5 Ohm
I=V/R
I=120/7.5
I=16 A
current 4A
R=V/I
R=30/4=7.5 ohm
potential difference 120 volt
resistance 7.5 Ohm
I=V/R
I=120/7.5
I=16 A
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