500 Joules of energy is produced each second in a 20 ohm bulb. Find the potential difference across the bulb.

accrding to joules law

H=I2* R*t

500=I^2*20*1

500/20=I^2

I2=25

I=5a

accrdng to ohms law

I=V/R

V=IR

=5*20

=100v

potential diffrce=100v

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