on what factors does the heating effect of a current depend? what are the practical applications of the heating effect of electric current?

When electric current flows through the appliances, heat is produced. The flow of current that produce heat is called heating effect of the current. Amount of heat produced depends upon

1) The strength of the current through the wire.

2) The nature of the material and the length & thickness the given wire.

3) The time for which electric current flows through the given wire.