Q. Three Charges 2q, -q and -q lie at vertices of a triangle. The value of E and V at centroid of triangle will be- (i) E#0 and V#0 (ii) E=0 and V=0 (iii) E#0 and V=0 (iv) E=0 and V#0

Answer: (iii) E#0 and V=0

Superposition of Electric field -The resultant electric field at any point is equal to the vector sum of all the electric fields

Electric field of all the charges do not cancel each other