Static Electricity Test Review
Name______________________
1. Draw a picture of an atom. Label the positively charged parts with a + and the negatively
charged parts with a - .
2. Like charges ________ and unlike charges ________.
3. How does the charge of an electron compare with the charge of a proton?
4. Describe two methods of how one object can charge another object.
5. Compare and contrast conductors and insulators.
6. Explain why a balloon rubbed on hair sticks to a wall using the terms charge, electrons and
polarization.
7. Draw a diagram of how a proton influences an electron.
8. Draw a diagram of how a proton influences another proton.
Static Electricity Test Review
Name______________________
9. Describe why lightning rods are made of metal and must be grounded to work.
10. What is the unit for charge?
11. The net charge of an atom equals
a. the number of protons in its nucleus.
b. the number of electrons surrounding its nucleus.
c. zero if the atom is electrically neutral.
d. always zero.
12. According to Coulomb’s law, the force between a pair of charged particles that are brought
closer together
a. decreases.
b. increases.
c. increases only if the charges are of the same sign.
d. increases only if the charges are of opposite signs.
13. When a cloud that is negatively charged on its bottom and positively charged on its top moves
over the ground below, the ground acquires
a. a negative charge.
b. a positive charge.
c. no charge since the cloud is electrically neutral.
d. an electrically grounded state.
14. When a negatively charged balloon is placed against a wooden door, positive charges in the wall
are
a. attracted to the balloon.
b. repelled from the balloon.
c. too bound to negative charges in the door to have any effect.
d. neutralized.
15. Electrons on the surface of a conductor will arrange themselves such that the electric field
a. inside cancels to zero.
b. follows the inverse-square law.
c. tends toward a state of minimum energy.
d. is shielded from external charges.