Why does a bulb glow when electric current passes through it class 8?

Why does a bulb glow when electric current passes through it?

The filament of an electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the filament which gives off light. … It is because of the Joule effect, which means that as the electrical current flows through them, the resistances heat up.

Does the bulb glow What does this indicate?

Glowing of the bulb would indicate that the loop of the key has touched the wire.

How does a bulb glow Class 10?

Complete step by step answer:

A bulb consists of a filament made of tungsten metal. When current is passed through the bulb the filament starts glowing and emits light. If the current drawn from the source is not sufficient enough the bulb does not glow.

Which effect of the electric current makes the incandescent bulb glow?

The filament is heated up to a high temperature and becomes white hot. This glowing filament gives light. This is the heating effect of the electric current. Hence option (D) is correct.

What is the thin wire in an electric bulb that glows called?

The typical incandescent light bulb contains a thin wire (usually tungsten) called a filament that has a high electrical resistance. This filament gets very hot when an electric current passes through it. The intense temperature makes the filament glow brightly.

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Is a path of electricity?

Electrical energy is energy produced by the movement of certain particles. This flow of particles is called electric current. … An electric circuit is a pathway through which electric current flows. Now you know that electric current flows through a path called a circuit.