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Subject :NSO    Class : Class 7

The diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness. A third lamp Z is connected in parallel with lamp X. What happens to the brightness of lamp Y?


A Brighter than normal
B Normal
C Dimmer than normal
D Very dim (cannot be seen).


Ans 1:

Class : Class 8
why a. why not b. i think that bulb x will turn dimmer but y will remain the same.

Ans 2:

Class : Class 8
Ans a

Ans 3:

Class : Class 8
As it is parallel to x

Ans 4:

Class : Class 9
Option is correct if the battery has infinite nergy

Ans 5:

Class : Class 8
option D

Ans 6:

Class : Class 8
option b

Ans 7:

Class : Class 8
brighter than normal as total current through the ckt will increase.

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