What is the coil of wire in the electric room heater known as?

Element

The correct answer is option 4. Element.

The element in an electric room heater is a crucial component responsible for generating heat. It is usually made of a high-resistance material, such as nichrome, which has a high melting point and can withstand the heat generated when an electric current passes through it.

When electricity flows through the coil of wire, it encounters resistance, causing the wire to heat up. This process is governed by Joule's law, which states that the heat generated in a conductor is directly proportional to the square of the current passing through it and the resistance of the conductor.

As the element heats up, it transfers thermal energy to the surrounding air through convection. This warmed air then circulates throughout the room, raising the ambient temperature and providing comfort to occupants.

In summary, the element in an electric room heater serves as the heat source, converting electrical energy into thermal energy that warms the air in the room.