Two spherical conductors of radii 4 cm and 7 cm has charge 500 coulomb and 60 coulomb respectively. Find energy loss when joined by a conducting wire.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. Initial energy U i = 
+ 
= 
+ 
After connection, net charge Q = Q 1 + Q 2 and net capacitance C = C 1 + C 2 = 4π 
(R 1 + R 2 )
∴ U f = 
∴ Δ U = U i – U f
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