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Q.

The radii of two metallic spheres P and Q are r1 and r2 respectively. They are given the same charge. If r1 > r2, then on connecting them with a thin wire, then

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a

neither the charge will flow from P to Q nor from Q to P

b

the charge will flow from Q to P

c

the charge will flow from P to Q

d

The information is incomplete

answer is D.

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Detailed Solution

Charge flows from high potential to lower potential. 
If positive charge is given, then V1 < V2 as r1 > r2
So positive charge flows from Q ➔ P.
If negative charge is given, then V1 > V2
So negative charge flows form P ➔ Q.
Since it is not given that whether the charge given is positive or negative, hence the information is incomplete.

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