Electrostatics Question 30
Question: The radii of two metallic spheres $ P $ and $ Q $ are $ r _{1} $ and$ r _{2} $ respectively. They are given the same charge. If $ r _{1}>r _{2} $ . then on connecting them with a thin wire, the charge will flow [MP PMT 1985]
Options:
A) From P to Q
B) From Q to P
C) Neither the charge will flow from P to Q nor from Q to P
D) The information is incomplete
Show Answer
Answer:
Correct Answer: D
Solution:
Since charge flows from high potential to lower potential.
If positive charge is given, then $ {V _{\text{1}}}<{V _{\text{2}}} $ as $ {r _{\text{1}}}>{r _{\text{2}}} $
So positive charge flows from Q ® P If negative charge is given, then $ {V _{\text{1}}}>{V _{\text{2}}} $
So negative charge flows form $ P\to Q $ .
Since it is not given that whether the charge given is positive or negative, hence the information is incomplete.
