Question

derive an expression for joule law of heating

Answer 1

HEYY!!!

If V is the POTENTIAL DIFFERENCE applied across a metal conductor of resistance R, the current through the conductor, give by OHM' S LAW,is

I = V/R ................1

The charge passing through the conductor in time t when current I flows through the conductor is,

Q = I x t ..............2

The work done in this process is

W = V x Q ............3

FROM 1, 2 & 3,

W = (IR) x (It) =IxIxRxt = VIt

THIS IS THE REQUIRED EXPRESSION OF JOULE'S LAW OF HEATING.

(= V x (V/R) x t = (VxV/R) x t
This work is converted into heat.)

HOPE IT HELPS.
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Answer 2

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