Two point charges `4 mu C` and `-2 muC` are separated by a distance of 1 m in air. At what point on the line joining the charge is electric potential zero?

Two point charges 4Q and Q are separated by a distance of 1 m in air. At what point on the line joining the two charges is the electric field intensity zero?

Two charges 5 xx 10^-8 C and -3 xx 10^-8 C 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.

Two point charges of +5xx10^-19C and +20 xx 10^-19 C are separated by a distance 2m. Find the point on the line joining them at which electric field intensity is zero.

Two charges 3xx10^-8C and -2xx10^-8C are located 15 cm apart. At what point on the line joining the two charges is the electrical potential zero? Take the potential at infinity to be zero.

Two charges 6xx10^-6C and -4xx10^-6C are located 10 cm apart. At what points on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.

Two points charges +10muC and -10muC are separated by a distance of 40 cm in air. Calculate the electrostatic potential energy of the system, assuming the zero of the potential energy to be at infinity.

Two point charges 4Q and Q are separated by a distance of 1 m in air. Also calculate the electrostatic potential energy of the system of two charges, taking Q = 2 xx 10^-7C .