Question

if heat produced is 200 joule with resistance 20 ohm for 10 seconds find voltage and current

Answer 1

Heat produced=200Joules
r=20ohm
t=10sec
$h = {i}^{2} \times r \times t \\ 200 = {i}^{2} 200 \\ {i}^{2} = 1 \\ i = 1 \\ \\ now \: for \: voltage \: apply \: ohms \: law \\ \\ v = ir \\ v = 1 \times 20 \\ v = 20volts$
hope this will help you.