Question

I've got resistance of 30ohms , current of 8 amperes which flows through it for 20 minutes calculate the amount of heat energy?

Answer 1

Answer:

$\sf{\underline{\underline{H=2304\ kJ}}}$

Explanation:

Given,

$\rightarrow\ \sf{R=30\ \Omega}\\\\\\\rightarrow\ \sf{I=8\ A}\\\\\\\rightarrow\ \sf{t=1200\ s}$

Then the amount of heat energy produced will be,

$\rightarrow\ \sf{H=I^2Rt}\\\\\\\rightarrow\ \sf{H=8^2\times30\times1200}\\\\\\\rightarrow\ \sf{\underline{\underline{H=2304000\ J}}}\\\\\\\rightarrow\ \sf{\underline{\underline{H=2304\ kJ}}}$