Question

The heating element of an electric heater should be made of a material having:

• A. High specifiic resistance and low melting point.
• B. Low specifiic resistance and low melting point.
• C. Low specifiic resistance and high melting point.
• D. High specifiic resistance and high melting point.

Answer 1

The correct option is D High specifiic resistance and high melting point.

When we use a heating element that has

1. High specific resistance: a small quantity of wire is used to generate the required amount of heat or else the quantity of wire would be required higher in order to heat.

2. High melting point: a higher melting point is selected so that higher temperature is attained. Nickel and chromium alloys are ideal as an heating element.