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The diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness

If a third lamp Z is connected in parallel with lamp X, then what will happen to the brightness of the lamp Y ?

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Brighter than normal

Normal

Dimmer than normal

Very dim (cannot be seen)

answer is A.

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Detailed Solution

Effective resistance of the combination of cells will decrease. Hence lamp ‘Y’ gives brighter light than normal.

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