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.
B SHOULD COME
Ans 1:
Class : Class 8
Ans 2:
Class : Class 9
Ans 3:
Class : Class 8
Please explain it. I am also confused about the answer. I myself did B.
Ans 4:
Class : Class 6
answer should be b because X will also lit up
Ans 5:
Class : Class 8
The answer key says that X will not light up,but why?
Ans 6:
Class : Class 6
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb is correct as current will flow though X but I do feel that current will prefer less resistant path so D can also be correct
Ans 7:
Class : Class 9
yes i too did B
Ans 8:
Class : Class 8
It must be B.The current finds a more direct path to Y, Making it brighter.But the current still reaches X because there is still a path. SOF Says otherwise.
Ans 9:
Class : Class 8
Ans 10:
Class : Class 7
I too am confused as current will also flow through both the bulbs when circuit is closed. It will pass through the switch first and hence lighting up bulb Y.
Ans 11:
Class : Class 8
answer should be B
Ans 12:
Class : Class 8
logically it should be B but sof says otherwise. why ????
Ans 13:
Class : Class 9
Yess,my answer was B also
Ans 14:
Class : Class 6
The answer should be B as it will be closed circuit
Ans 15:
Class : Class 10
b
Ans 16:
Class : Class 8
X will light up... I think it's incorrect....
Ans 17:
Class : Class 3
Option D is correct because current prefers the path that offers less resistance. The bulb provides resistance whereas the switch when closed does not. Hence correct answer is D
Ans 18:
Class : Class 8
The answer is B