Question

The voltage across the terminals of an electric bulb is 120 v when it draws a current of 4 A from the source
What current will the bulb draw if the voltage is 220v?​

Answer 1

Answer:

V=60VI=4A

R=

I

V

=

4

60

=15Ω

When potential difference is increased to 120V

I= RV

=15/120

=8A

The current through the heater becomes 8A