1. JEOPARDY $100 $200 $300 $400 $500 Final Jeopardy! Coulomb’s Law
Charge and The Atom
Methods of Charge Transfer
Conductors & Insulators
$100
$200
$300
$400
$500

2. Coulomb’s Law 100
How are force and charge related?
Direct or Inverse?

3. Answer
Direct! As charge increases, so does the force.

4. Coulomb’s Law 200 How are force and distance related?
Inverse or direct

5. Answer
Inverse! As the distance between two charges increases, the force decreases.

6. Coulomb’s Law 300
If the charge is halved, what will happen to the force?

7. Answer
Decreases (as charge decreases, so does force).

8. Coulomb’s Law 400
If the distance between two charges triples, the force will…

9. Answer
Decrease – as the distance increases the force decreases

10. Coulomb’s Law 500
If the charge doubles and the distance doubles, force will…

11. Answer
Decrease! Charge causes force to increase, but distance causes for to decrease. Because distance is squared, it plays a more important role than charge and causes force to change more. So, force will decrease more than it will increase, so there is a net decrease.

12. Charge & The Atom 100
State the charge for a proton, neutron, and electron.

13. Answer
Proton +1
Electron -1
Neutron no charge (0)

14. Charge & The Atom 200
What particle moves that causes the transfer of charge?

15. Answer
ELECTRONS!

16. Charge & The Atom 300
Draw a picture of an atom with a nucleus, electrons, protons, and neutrons. The atom should have a net charge of -5, and you should label the nucleus, electrons, protons, and neutrons in your picture.

17. Answer
Protons and neutrons are inside the nucleus of the atom, and the nucleus is at the center of the atom. There should be an equal number of protons and neutrons. Electrons are located outside the nucleus, and there should be 5 more electrons than protons.

18. Charge & The Atom 400
What is the net charge of +6 and -9?

19. Answer -3

20. Charge & The Atom 500
I rub a balloon on wool. The wool becomes positive. Explain how this happened.

21. Answer
Electrons moved from the wool to the balloon, leaving the wool positive.

22. Methods of Charge Transfer 100
When I touch a door knob and get shocked, the method of charge transfer is:
Conduction / Friction

23. Answer
Conduction! The doorknob is metal, so it is a conductor.

24. Methods of Charge Transfer 200
Before I touch the doorknob, I drag my feet on carpet. This method of charge transfer is…
Conduction / Friction

25. Answer
Friction! Both myself and the carpet are insulators

26. Methods of Charge Transfer 300
The negatively charged PVC pipe caused the water to attract towards it because the water became:
A) charged by conduction
B) charged by friction
C) Polarized

27. Answer
Polarized! The electrons in the water repel the PVC pipe and move away from it. The part of the water stream closest to the PVC pipe is positively charged, and moves towards the PVC pipe since it is attracted.

28. Methods of Charge Transfer 400
A person with long hair touches a Van de Graaff and their hair stands up on all ends. Why does this happen?

29. Answer
All of the hair strands have the same charge as the Van de Graaff (since they are touching… charge by conduction). They all repel one another and move as far away from each other as possible.

30. Methods of Charge Transfer 500
I touch a charged Van de Graaff and now have a positive charge. I touch a doorknob and get shocked. Explain the flow of charge that occurs here.

31. Answer
Electrons flow from me to the Van de Graaff leaving me with a positive charge. Electrons from the doorknob are attracted to me (since I am positive) and move from me to the doorknob, shocking me.

32. Conductors & Insulators 100
Is a paper clip a conductor or an insulator?

33. Answer
A paper clip is metal, so it is a conductor.

34. Conductors & Insulators 200
Is a balloon a conductor or an insulator?

35. Answer
A balloon is NOT a metal, so it is an insulator.

36. Conductors & Insulators 300
On which negatively charged object could electrons move more freely along the surface?
A) Glass
B) Clay Paperweight
C) Rubber Ball
D) Steel Ball

37. Answer
D) Steel Ball – electrons move most freely on conductors, and the steel ball is the only example of a conductor listed.

38. Conductors & Insulators 400
A Van de Graaff uses a plastic conveyor belt and a metal sphere to generate charge. Which object is the conductor and which is the insulator?

39. Answer
The metal ball is the conductor, the plastic belt is the insulator.

40. Conductors & Insulators 500
What is the difference between how electrons behave on a conductor vs. how they behave on an insulator?

41. Answer
Electrons can move freely on a conductor, but are stuck on an insulator (can not move).

42. Final Jeopardy!
I rub a balloon on wool. I rub another balloon on another piece of wool. When I bring the two balloons near each other, they will:
Repel / attract / nothing will happen

43. Answer
Repel. Both balloons will have the same charge when rubbed on the wool, which means they will repel since like charges repel.