Question

400 joules of heat is produced in 4seconds in a 4ohm resistance. find the potential difference across the resistance.​

Answer 1

Answer:

potential difference across the resistance is 20 volts. Hope this would help you

Given

H(heat)=400J

R(resistance)=4ohms

T(time)=4 seconds

H=I*I*R*T

I*I=H/R*T

=400/4*4

=25.

I=5

V=I*R(ohms law)

V=5*4

=20 volts

Hence the potential difference across the resistance is 20 volts