Question

What is the working principle of an electric heater? On which factors does the amount of heat produced depends? [3 MARKS]

Answer 1

Working Principle: 1.5 Marks
Factors: 1.5 Marks

Electric heater works on the principle of the heating effect of electric current. When an electric current is passed through the coil of the heater, it becomes hot. The coil of wire is called an element.

The factors on which the amount of heat produced depends on are:

1) the material of the coil
2) the length and thickness of the wire
3) the amount of current passing through the wire