A charged cloud system produces an electric field in the air near the earths surface.A particle of charge −2×10−9C is acted on by a downward electrostatic force 3×10−6N of when placed in the field,The gravitational and electrostatic force,Respectively,exerted on a proton placed in this field are
The electric field due to a charge at a distance of 3 m from it is 500 N/coulomb. The magnitude of the charge is [14πϵ0=9×109 N−m2coulomb2]