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Fuses

In the given ...

Question

In the given figure, a fuse in one of the bulbs causes all the others to go out. Which bulb has fused ?

A

1

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B

4

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C

3

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D

2

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Solution

The correct option is A 1
Fuse in one of the bulbs causes all the others to go out,this means that bulb is in series with the voltage source without any component parallel to it.

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figure

(a) Close the switch and notice which bulb does not light up.
(b) Close the switch after removing one bulb at a time until the others light up.
(c) Close the switch and replace the three bulbs with a new one.
(d) There is no way to find out.

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, when one bulb fuses, the other two bulbs continue to glow. Explain why this phenomenon occurs

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