A vertical electric field of magnitude 4×105 N/C just prevents a water droplet of mass 1×10−4 kg from falling. Find the charge on the droplet.
A charged water droplet hangs from ceiling of a room which has a uniform vertically upwards electrical field of strength 4.00 × 105 NC−1 . This field levitates and prevents a droplet of mass 1.0 ×10−4kg from falling. Can you find the net charge on the droplet?