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Three identical electric bulbs are connected parallel to each other. On connecting their combination across a source of emf having stabilized voltage and negligible resistance, all bulbs glow with full brightness. Suddenly a bulb fuses. The other bulbs will glow..

Question

Three identical electric bulbs are connected parallel to each other. On connecting their combination across a source of emf having stabilized voltage and negligible resistance, all bulbs glow with full brightness. Suddenly a bulb fuses. The other bulbs will glow..

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Solution

When the bulbs are connected in parallel, each bulb receives the full voltage of the power source. This is why they all glow with full brightness.

If one bulb fuses (burns out), it will not affect the circuitry of the other bulbs because they are connected in parallel. The current will simply bypass the fused bulb and continue to flow through the other bulbs.

Therefore, the other bulbs will continue to glow with full brightness even if one bulb fuses.

This problem has been solved

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