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a charged particle of mass 2 mg hang in ...

a charged particle of mass 2 mg hang in air in an electric field of strength` 4 N/C` directed upwards. the charge on the particle would be `(g=10m/s^2)`

A

`4×10^-6` C

B

`5×10^-6` C

C

`6×10^-6` C

D

`1.6×10^-19` C

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The correct Answer is:
B
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