A point charge q is brought from infinity (slowly so that heat developed in the shell is negligible) and is placed at the centre of a conducting neutral spherical shell of inner radius a and outer radius b, then work done by external agent is:
A
0
B
C
– 
D
– 
Text Solution
Verified by ExpertsThe correct answer is:
C
→ 
Work done by external agent:
W ext = U F – U i
∴ W ext = 
= 
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