Question

The potential difference between the terminals of an electric heater is 60v when it draws a current of 4 A from the source.what current will the heater draws if the potential difference is increased to 240v?​

Answer 1

Answer:

V=60VI=4A

R=IV=460=15Ω

When potential difference is increased to 120V

I=RV=15120=8A

The current through the heater becomes 8A

Answer 2

Answer:

for increased 120 v

substitute 240 v there

V=60VI=4A

R=

I

V

=

4

60

=15Ω

When potential difference is increased to 120V

I=

R

V

=

15

120

=8A

The current through the heater becomes 8A