How much energy does it take to bring two 20mC point charges to within 5cm of each other?

Question

asked Jun 5, 2024 145k views

1 Answer

Ryan Li · Answer 1 · 2024-06-11T10:38:26+0000

Answer:

Since the potential energy at infinity is usually defined as zero -

U = K Q1 Q2 / R = [1 / (4 Π 8.85E-12) * (20E-6)^2 / ,05

U = 9.00E9 * (20E-6)2 / .05 = 72 Joules