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Subject :NSO    Class : Class 8

Two identical light bulbs, X and Y, are connected in series as shown in the sketch below. How will the brightness of the bulbs change if switch S is closed?

A X-brighter, Y-dimmer
B X-dimmer, Y-brighter
C X-brighter, Y-not lit up
D X-not lit up, Y-brighter

How is bulb x not lit up?

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
when the switch was open then the current was flowing through the whole circuit. now when it is closed current will not flow through the whole circuit and will take the shortcut because current always chooses the shortest path. so bulb x will not be lit and bulb y will be brighter.

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