Question

what is the joules law of heating derive a relation for calculating the heat dissipated​

Answer 1

answer..

joules law of heating states that when a current I passes through the conductor of resistance r for time t then the heat developed in the conductor is equal to the product of the square of the current the resistance and time

H=i 2 r t

the reason behind the heat produced is the collisions of free electrons with the Lattice ions or atoms while accelerating in presence of external electric field

we know that

volt = work done / total charge or v =w/q

from this we get w=v/q

we know that current i = q/t

so q =it

putting in previous equation

we get w =vit

from ohm's law we get v =ir

putting it in previous equation

w = irit =i2rt as works is stored as soH I2rt joules

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