Electric Charges and Fields

Topics in this chapter

• Electric Charge Fundamentals
• Coulomb's Law
• Electric Fields And Superposition
• Electric Dipoles
• Electric Flux
• Gauss's Law Applications

Cheat sheet

Practice questions

1. Question 1Q-03A562

   How many distinct kinds of electric charge exist in nature?

   1. A.Four
   2. B.Three
   3. C.Two
   4. D.Five
   See the answer and solution
2. Question 2Q-15676D

   Which of the following correctly defines the electrostatic force between two charges?

   1. A.The force an electron exerts on a neutron.
   2. B.The force exerted by one charge on another when both are at rest relative to a chosen reference frame.
   3. C.The force exerted by one charge on another when both are moving relative to a chosen reference frame.
   4. D.The force exerted by one charge on another when both are accelerating relative to a chosen reference frame.
   See the answer and solution
3. Question 3Q-24BE39

   Two small spheres both carry positive charge and are brought near each other. How do they interact?

   1. A.They pull toward each other.
   2. B.They sometimes pull together and sometimes push apart.
   3. C.They always pull toward each other.
   4. D.They push away from each other.
   See the answer and solution
4. Question 4Q-4DBE3B

   When a neutral atom becomes ionized, what has happened to it?

   1. A.It has only gained one or more electrons.
   2. B.It has only gained one or more neutrons.
   3. C.It has only gained one or more protons.
   4. D.It has either gained or lost one or more electrons.
   See the answer and solution
5. Question 5Q-684AF9

   A charging belt in a Van de Graaff generator strips electrons off its surface and dumps 2 x 10^9 electrons per second onto a metal dome. Roughly how long must it run continuously to build up 1 C of charge on the dome?

   1. A.About 50 years
   2. B.About 100 years
   3. C.About 150 years
   4. D.About 120 years
   See the answer and solution