What is heating effect of electric currebt obtain the relation to produced heat generated by a flow of charge'Q' through a potential differenced'V'
Answers
Explanation:
When current passes through the wire conductor, the temperature of the conductor increases and heat is emitted. This is called the heating effect of electric current. Consider a current I flowing through a resistor of a resistance R. Let the potential difference across it be V. Let 't' be the time during which a charge Q flows across the resistor.
The work done in moving charge Q from one point to another through a potential difference V is VQ. Therefore the source must supply energy which is equal to VQ in time t.
Hence the power, P=
t
VQ
.......(1)
∵I=
t
Q
...........(2)
∵P=VI . (3)
energy supplied in time
′
t
′
=P×t .....(4)
∵P×t=VIt
From (3) and (4) equation
The energy supplied gets utilised in the form of heat.
H=VIt
Ohm's law V=IR
On substituting V in H=VIt
We get H=IR×It
H=I2Rt.