state and explain joule's law of heating
Answers
Joule’s law of heating states that,
when a current ‘i ' passes through a 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.
Answer:
Joule’s law of heating states that,
when a current ‘i ' passes through a 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.
Joule’s law is a mathematical expression of the rate at which resistance in a circuit turns electric energy into heat energy. The heat produced because of the current flow in an electric wire is represented in Joules.
The joule’s law of heat displays the connection between heat generated Via a conductor by flowing electric current.
Q = I2 ✕ R ✕ T
Where
Q = Amount of heat
I = Electric current
R = Amount of electric resistance in the conductor
T = Time
we know that
V = W/Q………………………..(1)
Where
V = Volt
W = Work done
Q = Total charge
Equation (1) we get
W = VQ…………………(2)
And Current (I) = Q/T…………………(3)
And Q = IT……………….(4)
Substitute equation (4) in equation (3) we get
W = VIT…………………(5)
Consider Ohm’s law
V = IR…………………(6)
Substitute equation (6) in equation (5) we get
W = IRIT
W = I2RT