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

Potential energy of a system of charges is directly proportional to the product of charges and inversely to the distance between them.Two point charges 3 x 10^(-8) C and - 2 x 10^(-8) C are separated by a distance of 15cm. At what point on the line joining the charges the potential is zero?

Find the distance of the point (4,2) from the line joining (4,1) and (2,3).

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.

Find the slope of the line joining the points (2,2) and (5,3).

Find the equation of the line joining the points (2,2) and (5,3).

Find the distance of the point (- 2,3) from the line x - y = 5.

Two point charges of 2 xx 10^(-7)C are 1.0 cm apart. What is the magnitude of the field produced by either charge at the side of the other?

Two point charge of 20muC and 80muC are placed 18cm apart .Find the position where the electric field is zero.