Question

state joules law and also write the formula​

Answer 1

Answer:A quantitative form of Joule's law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I2R. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.

Explanation:

This equation is the Joule's equation of electrical heating. Joule's law states the amount of heat production in a conductor is : Directly proportional to the square of electric current flowing through it. ... Directly proportional to the time for which electric current flows through the conductor.

Answer 2

Joule's Law

Let a current carrying wire of resistance R and q amount of charge is flowing through the wire in t time.

now..(current)I=q/t

now ..if H is the heat or work done by the potential difference at the end of the wire..

then according to the Joule's law...

H=I²Rt

statement

(1)

the produced heat (H)is proportional to the square of the current (I).when R and t are constant..

H∞I²

(2)the produced heat (H)is proportional to the resistance (R).,,,when I and t are constant..

H∞R

(3)the produced heat (H)is proportional to the resistance (t).,,,when R and I are constant..

H∞R

now....

H∞I²Rt

=>H=I²Rt/J

where..J=jolues constant..