Question

why do the bulb have two terminals

Answer 1

An electric cell has two terminals; one is called positive (+ ve) while the other is negative (– ve). An electric bulb hasa filament that is connected to itsterminals. An electric bulb glows when electric current passes through it.

Answer 2

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Bulb have two terminals, because an electrical circuit is a closed loop & current has to flow through things to make them work.

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❖ An electric cell has two terminals:-
♦ Positive (+ ve)
♦ Negative (– ve)

❖ An electric bulb glows when electric current passes through it.

❖ By connecting electricity to each terminal, a current is allowed to flow through it & produce light.

❖ The filament is glowing white-hot because of the energy it is dissipating & thus giving off light.


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