Two initially uncharged conductors, 1 and 2, are mounted on insulating stands and are in contact, as shown below. A negatively charged rod is brought near but does not touch them. With the rod held in place, conductor 2 is moved to the right by pushing its stand, so that the conductors are separated. Which of the following is now true of conductor 2? O a It is positively charged. It is uncharged. O b It is charged, but its sign cannot be predicted. O d It is negatively charged.

In the figure two tiny conducting balls of identical mass m and identical charge q hang from nonconducting threads of length L. Assume that is so small that tan 0 can be replaced by its approximate equal, sin 8. If L = 140 cm, m = 10 g, and x = 6.0 cm, what is the magnitude of q? L ᏀᎾ Ꮎ Number i L 9 0.0000009165 Units nC

Two uncharged spheres are separated by 3.00 m. If 1.30 x 1012 electrons are removed from one sphere and placed on the other, determine the magnitude of the Coulomb force (in N) on one of the spheres, treating the spheres as point charges. HINT N

The diagram below shows two metal spheres taken from Newton's cradle and separated by a distance of 0.1 meters. Thẻ charge on sphere A is +6.0 x 10 3 coulomb and the charge on sphere B is +3.0 x 10 3 coulomb. -0.1 m- A B Which statement best describes the electrical force on the spheres? O It has a magnitude of 162,000 N and is repulsive. O It has a magnitude of 162,000 N and is attractive. O It has a magnitude of 16,200 N and is attractive. O It has a magnitude of 16,200 and is repulsive.