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User from School
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:

AANYA BARANWAL from KPS SCHOOL, bhilai
Class : Class 5
answer should be B

Ans 2:

from ,
Class :
The answer should be B as it will be closed circuit

Ans 3:

from ,
Class :
X will light up... I think it's incorrect....

Ans 4:

Amol Athawale from WoodRidge High, aurangabad
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 5:

from ,
Class :
Please explain it. I am also confused about the answer. I myself did B.

Ans 6:

Avyukth Radhakrishnan from TSRS, Gurgaon
Class : Class 10
b

Ans 7:

SaiKrishna from Chettinad Vidyashram, Chennai
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 8:

Priyanshi from Delhi Public School Agra, Agra
Class : Class 9
Yess,my answer was B also

Ans 9:

from ,
Class :
The answer is B

Ans 10:

Yatharth Agrawal from Indira National school, Pune
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 11:

Kingshuk Gupta from RN Podar school, Mumbai
Class : Class 9

Ans 12:

Vishwanath Halkeri from sudarshan vidya mandir, Bangalore
Class : Class 8

Ans 13:

from ,
Class :
The answer key says that X will not light up,but why?

Ans 14:

Prabhav Kaushik from DPS Noida, Noida
Class : Class 10

Ans 15:

from ,
Class :
logically it should be B but sof says otherwise. why ????

Ans 16:

Vaidheesh Bharadwaj from NPS, Bangalore
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 17:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9
yes i too did B

Ans 18:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7
answer should be b because X will also lit up

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