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Dhruvan G from Indian School al Ghubra, Muscat
Subject :NSO    Class : Class 8

There are two different solutions in set up P and Q as shown in figure. The bulb in the set up P glows more brightly as compared to that of the set up Q. What are the possible causes for this?

(i) The connections of the circuit Q may be loose.
(ii) The liquid in Q may have small conductivity.
(iii) Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P.

A Only (i) and (ii)
B Only (ii) and (iii)
C Only (i)
D Only (ii)


I don't understand (iii)

Ans 1:

Student from School, City
Class : Class 5
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

Ans 2:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
It’s not mentioned about tightness of the circuits.

Ans 3:

Akshara from NPS, Bengaluru
Class : Class 8
Yes.. Tightness is not mentioned.

Ans 4:

Student from School, City
Class : Class 5
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

Ans 5:

Ankit kumar Jha from Ryan International School , Ghaziabad
Class : Class 9
but how do we know that the circuit is conneced tightly???

Ans 6:

Prabhav Kaushik from DPS Noida, Noida
Class : Class 8

Ans 7:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9

Ans 8: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B

In given figures, both the circuits are tightly connected and both the liquids conduct electricity because both the bulbs are glowing. The bulb in the set up P glows more brightly as compared to that of the set up Q might be because of any of the two possibilities:

1. The liquid in Q may have small conductivity. 

2.  Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P. 


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