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प्रश्न
The following diagram shows four circuits A, B, C and D. Each circuit has a cell and a torch bulb. Name the circuits in which the bulb will glow? Give reason to your answer.
विकल्प
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उत्तर
The bulb will glow in Circuit A because it has copper and aluminum, which are good conductors of electricity. It will not glow in Circuit B because silk is an insulator and does not allow current to flow.
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