Question

State joules law of heating , it’s mathematical expression

and name two device which works on this principle.​

Answer 1

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.

Q = I2 R T

Where,

Q indicates the amount of heat

I show electric current

R is the amount of electric resistance in the conductor

T denotes time

Explanation:

toaster

Iron box

heater

Answer 2

Answer:

Joule's law of heating states that power of heating generated by an electrical conductor is proportional to the product of its resistance (R) and square of the electric current passing through the conductor with time.