Question

what is joules law ?

Answer 1

It is a law stating that the heat produced by an electric current (i) flowing through a resistance (R) for a time tis proportional to i ^2 Rt.

Answer 2

Hey There is your answer----------
Joule's laws are two laws about heat produced by an electric current and the energy dependence of a gas to pressure,volume and temperature
Joule's first law 
                             shows the relation between heat generated by an electric current flowing through a conductor. It is named after James Prescott Joule and shown as:
Where Q is the amount of heat, I is the electric current flowing through a conductor, R is the amount of electric resistance present in the conductor, and t is the amount of time that this happens for.
Joule's second law 
                                   says that the internal energy of an ideal gas does not change if volume and pressure change, but does change if temperature changes.
Joule's law can be stated as :The quantity of Heat (H) generated in a conductor of Resistance (R), when a current is directly proportional to: 
1)The square of the current 
2)The resistance of the conductor 
3)The time for which the current flows.

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