Question

400 joule of heat is produced in each second in a 4ohm resistance.find the potential difference across the resistor?

Answer 1

Answer:

$h = {v}^{2} \div r \times t \\ t = 1 \\ r = 4ohm \\ h = {v}^{2} \div r \times t = {v}^{2} \div 4 \times 1 \\ 4 \times 400 = {v}^{2} \\ {v} = 40v$

potential difference = 40v