MCQ
Q.
The coil of wire used in electric heaters is called a/an________.
Correct Answer: D
The correct answer is Element.
Key Points
- An electric room heater or an electric heater used for cooking contains a coil of wire.
- The coil of wire used in electric heaters is called a heating element.
- The heating coil of the electric room heater transfers the electric energy into heat energy.
- The elements become red hot and give out heat after connecting to the electric supply.
- The amount of heat produced in a wire depends on its material used, length, and thickness.
- The coil of the electric heater is made up of nichrome.
- Nichrome consists of 80% nickel, 20% chromium.
Additional Information
- The filament is usually made of very thin tungsten wire.
- In an incandescent bulb, an electric current is passed through a metal filament.
- A cell is a single unit device that converts chemical energy into electric energy.
- It produces electricity capable to run smaller appliances.
- A battery usually consists of a group of cells.
Mistake Points
- A filament is a fine resistance wire the purpose of which is to emit white light.
- An element is a resistive wire the sole purpose of which is to produce heat.
