Joules law of Heating

Write the mathematical expression for Joule's law of heating.

Derive an expression for heat produced in a conductor using Joule's law of heating.

State Joule's law of heating effect of electric current. What is the cause of it ? Is it reversible or not ?

State Joule's law of heating by electric current. Name the materials used to making (i) standard resistors (ii) heater element.

State Joule's law of heating and give its mathematical form. An electric iron takes a current of 5A and develops 1.5 xx 10^(4) J of heat energy in 30 s. Calculate the resistance of the electric iron.

According to Joule's law of heating , heat produced H = I^(2) Rt , where I is current , R is resistance of I , R , and t are 3% , 4% , and 6% , respectively , find error in the measurement of H .