A vertical electric field of magnitude just prevents a water droplet of mass from falling

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

Problem

A vertical electric field of magnitude

4.00 \times 10^5\,\text{N C}^{-1}

just prevents a water droplet of mass

1.00 \times 10^{-4}\,\text{kg}

from falling. Find the charge on the droplet.