Question

Derive the expression for Joule's heating effect of current.. No Spam Ans !!!

Answer 1

We know, W=VIt (from the chapter of current electricity), where
W=work done
I=current
t=time
Now, By Ohm's law, V=IR......(1)
So, putting the value of V of (1) ,
we get,
W=(IR)*I*t
Here W means work done, that is energy spent i.e. heat energy....
Hence,
H=IR*I*t
=I²Rt

HOPE IT HELPS....
:)

Answer 2

W=V×T×I

W=work done

I=current

T=time

Now, By Ohm's law, V=IR......(1)

So, putting the value of V of (1) ,

we get,

W=(IR)×I×T

Here W means work done, that is energy spent i.e. heat energy....

Hence,

H=IR×I×T

=I²RT

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