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A small charged particle of mass ‘m’ and...

A small charged particle of mass ‘m’ and charge q is suspended by an insulated thread in front of a very large conducting charged sheet of surface density of charge `sigma`. The angle made by the thread with the vertical in equilibrium is

A

`tan^-1((sigmaq)/(2epsilon_0mg))`

B

`tan^-1((sigma)/(2epsilon_0mg))`

C

`tan^-1((q)/(2sigmaepsilon_0mg))`

D

Zero

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