Name____________________________________________________________ Period ______________

Electrostatics and Coulomb’s Law Worksheet

1. Do electrons have a positive or negative charge? How about protons?

2. What does the symbol μ mean?

3. What is a coulomb?

4. A small cork with an excess charge of is placed 0.12 m from another cork, which carries a charge of .

a. What is the magnitude of the electric force between the corks?

b. Is this force attractive or repulsive?

5. A balloon rubbed against denim gains a charge of . What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm?

6. Two electrostatic point charges of and exert a force on each other of 175 N.

a. Is this force attractive or repulsive?

b. What is the distance between the two charges?

7. Two identical conducting spheres are placed with their centers 0.30 m apart. One is given a charge of and the other .

a. Find the electric force exerted by the first sphere on the second sphere.

b. Find the electric force exerted by the second sphere on the first sphere.