An oil droplet carries a charge of

PHYSICS · Subjective · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

-2e

, where

e = 1.6\times10^{-19}\,\text{C}

. It is suspended at rest between two parallel plates separated by

5.0\,\text{mm}

when the upper plate is at

220\,\text{V}

relative to the lower plate. Assuming a uniform electric field and neglecting air resistance, calculate the mass of the droplet. Use

g = 9.8\,\text{m}\,\text{s}^{-2}