derivation of joules law
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Work done in carrying a charge Q through a potential difference V is given as
Also, Q = I t
Using Ohm's law, V = I R
W = I^2Rt
This work done in carrying the charge th rough the wire appears as the heat produced. i.e.,
H = V I t = I^2 Rt.
this energy is dissipated as heat energy.
This relationship is also known as Joule's Law of Heating
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