Question

define electric field at a point. state its si unit. explain why test charge q0 should be infinitesimally small. show the direction of the electric field due to isolated (i) +ve and (ii) -ve charge?

Answer 1

EF is an imaginary space around the source charge in which any other charge experience force of interaction when it is placed in that space

to cal. how much force one of the charges must be small or q tending to 0

EF for +ve charge is away from +charge and towards for -ve charge