Question

Problem 12

Part A

Consider two metal spheres of the same radius and mass. Sphere A is given an initial net charge of qA-136 μC and Sphere B is given an initial net charge of qB = 22.2 The spheres are brought into contact with each other and then separated again. Calculate the final net charge on Sphere A.

Part B:

Answer 1

As both spheres are of equal radii, the final charge on both spheres will be equal Therefore from conservation of charge q + q = q_A + q_B = 136 + 22.2 Therefore q = -79.1 mu c Answer (B) F = F_1 (due to 6 mu c) + F_2 (due to - 3 mu c & 9 mu c) = -k times 6 times 5 times 10^- 12/(3)^2 j - k times 5 times (9 + 3) times 10^- 12/(3)^2 I = -9 times 10^9 times 30 times 10^- 12/9 j - 9 times 10^9 5 times 12 times 10^- 12/9 i = -0.03 j - 0.06 i = -0.06 i - 0.03 j N