Solution to task 301 from Chertov´s for extramural stud

Solution to task 301 from Chertov´s for extramural stud

301. Point charges Q1 = 20 µC and Q2 = -10 µC are at a distance of d = 5 cm from each other. Determine the field strength at a point located r1 = 3 cm from the first and r2 = 4 cm from the second charge. Also determine the force F acting at this point on a point charge Q = 1 μC.