Question

derive the formula of heating effect of electric current is
h=I*IRT

Answer 1

The amount of heat produced in a wire is directly proportional to the square of current passed through the wire. 
Heat α (current)²
H α I² (equation 1)

The amount of heat produced in a wire is directly proportional to the resistance of the wire. 
Heat α Resistance
H α R (equation 2)

The amount of heat produced in a wire is directly proportional to the time for which the current is passed.
Heat α time
H α t (equation 3)

Combining the three equations
Heat is directly proportional to the square of current, time, resistance.
H α I²Rt
H = I²Rt


Hope this helps you.

Answer 2

Answer:

The amount of heat produced in a wire is directly proportional to the square of current passed through the wire.  

Heat α (current)²

H α I² (equation 1)

The amount of heat produced in a wire is directly proportional to the resistance of the wire.  

Heat α Resistance

H α R (equation 2)

The amount of heat produced in a wire is directly proportional to the time for which the current is passed.

Heat α time

H α t (equation 3)

Combining the three equations

Heat is directly proportional to the square of current, time, resistance.

H α I²Rt

H = I²Rt

Explanation:

hope it helps