Particle A, with a charge of 5 nC, is placed 25 cm away from Particle B, which has a charge of 10 nC.
a) Calculate the electric field at a point midway between A and B.
b) Determine the force between A and B.
c) Find the potential energy of the system.
d) Calculate the magnitude of the electric field produced by Particle A at a point 10 cm away from it.