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If X, Y and Z in figure are identical la...

If `X, Y` and `Z` in figure are identical lamps, which of the following changes to the brightness of the lamps occur when switch `S` is closed?

A

`X` stays the same, `Y` decreases

B

`X` increases ,`Y` decreases

C

`X` increases,`Y` stays the same

D

`X` decreases,`Y` increases

Text Solution

Verified by Experts

The correct Answer is:
B
Resistance of circuit decreases that increases current through `x`. So its brightness increases. Volttage across `Y` decreases so it brightness will decreases.
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