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A particle of mass 1.96 xx 10^(-15)kg is...

A particle of mass `1.96 xx 10^(-15)kg` is kept in equilibrium between two horizontal metal plates having potential difference of 400 V separated apart by 0.02 m. Then, the charge on the particle is (e = electronic charge)

A

3e

B

6e

C

2e

D

5e

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