What is the potential of the point where all 3 phase lines connected together ?

What is meant by potential at a point?

Two tiny spheres carrying charges 1 muC and 3 mu C are located 40cm apart. Find the potential at the mid point of the line joining the charges.

Two charges 5 xx 10^-8C and -3 xx 10^-8C are located 16 cm apart. At what point(s) on the line Joining the two charges is the electric potential zero? Take the potential at infinity to be zero.

The electric field lines are closer together near object A than they.are near object B. We can conclude that. (a)the potential near A is greater' than the potential near B. (b)the potential near A Is less than the potential near B. (c)the potential, near A is equal to the potential near B (d)nothing about the relative potentials near A and B.

Consider the ellipse x^2/9+y^2/4=1 and the line x/3+y/2=1 Find the points where the line intersects the ellipse ?