Charges of 2 10^-6 C and 3 10^-6 C are 0.1 m apart in free space. The force between them is (k = 8.99 10^9 N m^2 C^-2):

  1. 0.539 N, repulsive
  2. 10.8 N, repulsive
  3. 5.39 N, repulsive
  4. 5.39 N, attractive
Answer

C) 5.39 N, repulsive

F = kq1q2r^2 = 5.39 N; like charges repel. SLO P-11-E-07 · Application

Physics MCQ · More Electrostatics MCQs · Practise