Question

A -4.0-µC charge is located 0.30 m to the left of a +6.0-µC charge. What is the magnitude and direction of the electrostatic force on the positive charge?

Answer 1

The charges attract each other, so the force on the positive charge is to the left. Use Coulomb's law for the magnitude.

F = k q1*q2/R^2

Answer 2

10

Answer 3

F = k q1*q2/R^2

F = 9x10^9((4*10^-6)(6*10^-6)/0.3^2)

F = 2.4 N to the left