Give reason: (a) Why do bulbs have two terminals? (b) A fused bulb does not glow. Why? (c) When the chemicals in the electric cell are used up, the electric cell stops producing electricity. The electric cell is then replaced with a new one. In the case of rechargeable batteries (such as the type used in mobile phones, cameras, and inverters), they are used again and again. How?

Give reason: (a) Why do bulbs have two terminals? (b) A fused bulb

1.	Give reason: (a) Why do bulbs have two terminals? (b) A fused bulb does not glow. Why? (c) When the chemicals in the electric cell are used up, the electric cell stops producing electricity. The electric cell is then replaced with a new one. In the case of rechargeable batteries (such as the type used in mobile phones, cameras, and inverters), they are used again and again. How?
Answer» a )The bulbs have TWO terminals because, a circuit can be completed only when there are both the positive terminal as well as negative terminal, as the current flow is allowed only when the circuit is COMPLETE. Hence, the bulb has two terminalsb) Sometimes an ELECTRIC bulb does not glow even if it is connected to the cell. ... A break in the filament of an electric bulb means a break in the path of the current between the terminals of the electric cell. Therefore, a fused bulb does not light up as no current passes through its filament (c) When the chemicals in the electric cell are used up, the electric cell when-the-chemicals-in-the-electric-cell-are... The electric cell is then replaced with a new ONE. In case of REC. ... a new one. In case of rechargeable batteries (such as the type used in mobile phones, camera and inverters), they are used again and again. ... But, there is a way to use discharged batteries again by reversing the reaction which produce electricity

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