Question

write the mathematical expression for joule 's law of heating. Give some devices work on this principle. ​

Answer 1

Expression:

It is expressed as

H= I²Rt  (or)  V²/R×t

where (I=V/R).

In this,

H= heat of the substance

I= current through the substance

R= resistance

T= Time

Examples:

Some of the examples of heating with the electric current are as follows:

1) Heaters

2) Geyser