Question

Q9. 400 J of heat is produced in 4s in a 4 Ω resistor. Find potential difference across the resistor.

Answer 1

Given:

Heat = 400J
Time t = 4s
Resistance = 4Ω

Formula:

Heat produced H = i²Rt
                           H=(V/R)²Rt
                           H=V²t/R
                           V² = HR/t
                           V = √(400×4/4)
                           V = 20 V
Therefore, The potential difference across the resistor is 20V

Answer 2

HELLO DEAR ,

____________________

Given,

☆Heat produced, H=W=100 J

☆Resistance, R=4 ohm

●Using relation,H = I^2Rt

=(V/R)2×R×t

=V^2/R×t

●Putting the values,

100=V^2/4×1

_______________\\
=> Or  V= 20 volt. --------- ( Ans.)
=================//

■■ Potential difference across the resistance is 20 volt. ■■
______________________

Hope it helps u !!!!

Have a wonderful day ahead :))

Cheers !!✌✌

# Nikky