yagna
from
DPS, Surat
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:
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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 3:
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Class : Class 7
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 6:
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Ans 7:
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Akshay Malhan
from
NHSS, Thane
Class : Class 8
logically it should be B but sof says otherwise. why ????
Ans 9:
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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 13:
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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