Question

the potential difference of an electric heater is 60volts and it draws a current 4ampere.what current will the heater draw if the potential difference is increased to 120 volts

Answer 1

V=IR
SO
60=4*R
R=60/4
R=15 Ohm

R WILL BE SAME
SO BY
V=IR
120=I*15
I=120/15
I=8A

Answer 2

v = 60volts
I = 4 ampere
R = V/I
R = 60/4
R = 15 ohm
now ,
R is same then,
I = V/R
I = 60 / 15
I = 4 ampere
I hope it help you