Electrostatics Question 769

Question: Two metal pieces having a potential difference of 800 V are 0.02 m apart horizontally. A particle of mass 1.96×1015kg is suspended in equilibrium between the plates. If e is the elementary charge, then charge on the particle is

Options:

A) 8

B) 6

C) 0.1

D) 3

Show Answer

Answer:

Correct Answer: D

Solution:

[d] In equilibrium, F=qE=(ne)Vd=mg

n=mgdeV=1.96×1015×9.8×0.021.6×1019×800=3



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