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Q.

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 P is salted water while liquid in Q is tap water.

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a

Only (i) and (ii)

b

Only (i)

c

Only (ii)

d

Only (ii) and (iii)

answer is B.

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Detailed Solution

Both liquids conduct electricity.  In figure both the circuits are tightly connected as bulb
glow reasons are given in (ii) and (iii)

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