A small charged ball is hovering in the state of equilibrium at a height h over a large horizontal uniformly charged sheet. What would be the acceleration of the ball if a disc of radius r = 0.001h is removed from the plate directly underneath the ball-
A
B
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Text Solution
Verified by ExpertsThe correct answer is:
A
Equilibrium mg = qE
Now σ × πr 2 charged disc is removed.
As r is very less we can treat disc as a point charge
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