Why the bulb light when two electrodes were in contact with each other?

How does a bulb work in a circuit?

The battery pushes the electricity along the wires from the positive terminal, through the bulb and back to the negative terminal. This creates a circuit. … The bulb glows because electricity flows through the filament. When the bulb gets old, the filament breaks and this breaks the circuit.

What is the principle involved in the glowing of an electric bulb?

An electric bulb works on the principle of hearing effect of current. … This filament gets heated up to emit light when current passes through it.

How is a light bulb charged?

The light bulb get recharged automatically whenever the switch is ON. It uses electricity to product light and charge the back-up battery.

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