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
Net E F I at G≠O
Net Potential at G,
