Electrostatics Question 5
Question: The insulated spheres of radii $ R_1 $ and $ R_{2} $ having charges $ Q _{1} $ and $ Q _{2} $ respectively are connected to each other. There is [NCERT 1971, 84; MP PMT 2001]
Options:
A) No change in the energy of the system
B) An increase in the energy of the system
C) Always a decrease in the energy of the system
D) A decrease in the energy of the system unless $ Q _{1}R _{2}=Q _{2}R _{1} $
Show Answer
Answer:
Correct Answer: D
Solution:
When $ \frac{Q _{1}}{R _{1}}\ne \frac{Q _{2}}{R _{2}}; $ current will flow in connecting wire so that energy decreases in the form of heat through the connecting wire.
