Question

In this example, we find the work needed to create a dipole by bringing in two point charges of mass m = 0.006 kg ; and opposite charge Q = 6 nC, from infinity, to within a distance d = 18 nm of one another. Gravity should be ignored.

a) Find the potential energy between the two point charges when they are an infinite distance away from one another.

   

b) Find the electrostatic energy between the two charges when they are a distance d from one another.

   

c) Find the change in potential energy between the two charges as they are moved from infinity to the final position, a distance d = 18 nm apart.

   

d) The charges start out at rest and end at rest. Find the change in their kinetic energy.

   

e) Find the change in mechanical energy.

   

f) Using W_nc = ΔME, find the work done by you to bring them from infinity to the final position.

   

g) Is the work done by you equal to W_nc ? yes or no

(Please explain thoroughly all the steps. Thank you)

Answer 1