Number of electric lines of force emanating from 1C of positive charge in vacuum is :
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]
The point charges 1C, 1C and 1C are placed at the vertices A, B and C of an equilateral triangle of side 1m. Then :
(A) The force acting on the charge at A is 9×109N
(B) The electric field strength at A is 9×109NC−1