Question

Calculate the quantity of heat that will be produced in a coil of resistance $75\Omega$ if a current of $2A$ is passed through it for $2$minutes.

Answer 1

Step-1 Given data

Resistance of coil, $R=75\Omega$.

Current passing through the coil, $I=2A$.

Time taken, $t=2mint=2\times 60sec=120sec$

(Note- $1min=60sec$)

Step-2 Finding the heat produced

According to Joule's law of heating, the heat produced in the coil is, $H=I^{2}Rt$

Where,$H=Heatproduced,I=Current,R=Resistor,andt=Time.$

$H={\left(2\right)}^2\times 75\times 120$

$H=36000Joule.$

Hence, the heat produced in the coil is $36000Joule.$