A pair of parallel metal plates is separated by a distance of and maintained at a…
PHYSICS · Multi-part · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields
Problem
A pair of parallel metal plates is separated by a distance of 4.0mm and maintained at a potential difference of 6.0kV. A tiny oil drop carrying a net charge of 2.0×10−9C is released from rest at a point midway between the plates. Ignore gravitational effects on the drop for this calculation.
(i) Calculate the magnitude of the electric field between the plates.
(ii) Determine the magnitude of the electric force acting on the oil drop at the instant of release.
(iii) If the separation of the plates is increased to 6.0mm while the surface charge on the plates remains unchanged, what potential difference must now be applied between the plates to produce the same electric field as in part (i)?