Two small, identical spherical conductors carry charges of 8.1 C and -2.5 C. The

Question

Two small, identical spherical conductors carry charges of 8.1 C and -2.5 C. They are separated by a distance of 48.0 cm.

**Just C and D please.

A) Calculate the magnitude of the electrostatic force between these two spheres.

B) Is the force between the spheres in the above problem attractive or repulsive?

C) The spheres described in the previous problem are brought into contact and then returned to their original separation.

D) Calculate the magnitude of the electrostatic force between these two spheres Is the force between the spheres in the above problem attractive or repulsive?

Explanation / Answer

When they are brought in contact they will average out each others charges

charge on each sphere= (8.1-2.5)/2=5.6/2uC = 2.8uC

D)

Force is given by

F=kq1q2/r2

F=9*109 * (2.8*10-6)2/0.482 = 0.30625N

Since they have similar charge hence force will be repulsive

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