Question

A current of 2 amperes (2A) flows through a conductor of resistance $20\Omega$ for 5 minutes. Calculate the amount of heat produced in KJ.

• A. 24
• B. 36
• C. 42
• D. 12

Answer 1

The correct option is A

24

Given
current I = 2A,
$resistanceR=20\Omega$ and
time t = 5 mins = 300s.
We know,

H = $I^2$​RT

$H=2^2\times 20\times 300$ Joules

H = 24000 J

H = 24 KJ