Derivation of joules law of heating effect
Answers
Answered by
5
P=V q÷t =VI
H=VIT
by applying ohms law
H=square of the current ×R×t
H=VIT
by applying ohms law
H=square of the current ×R×t
Answered by
33
╔════════════════╗
...HERE GØΣS UR ANS...
╚════════════════╝
According to Joules law of heating, when a current I flows through a resistance R then :
Heat produced is
(I) Directly proportional to the square of current for a given resistance
(II) Directly proportional to the resistance of given circuit.
(III) Directly proportional to the time for which the resistance flows through the resistor.
So eqⁿ is
let us consider a resistance R , in which I amount of current flows.
Work must be done by current to move continuously.
W=Qx V
BUT Q=IXt
W=IxVxt
but from ohms law: V=IR
assuming the electrical energy consumed is converted into heat energy .
we write work done as Heat produced.
so
Similar questions