Basic Idea:

• Examine the behavior of positve and negative charges.

• 7

	What:	How Many:	Where:
	Small piece of foil on silk thread	1	non-Majors storeroom, shelf K3
	50 cm rod	1	non-Majors storeroom, shelf A3
	Pendulum clamp	1	non-Majors storeroom, shelf C2
	Large bench clamp	1	non-Majors storeroom, shelf C4
	Glass rod	1	non-Majors storeroom, shelf HH3
	Hard rubber rod	1	non-Majors storeroom, shelf K3
	Dead animal fur (the deader the better)	1 chunk	non-Majors storeroom, shelf K3
	Paper towel	1	From dispenser in the lab
	Metal spheres on insulated base	2	non-Majors storeroom, shelf K2
The following item is shared:
	Oscilloscope (an old one)	1	Majors storeroom - Ask Jeff

Notes:

• Lab setup (photo details):
  • Note: This experiment may already be set up in the 104 lab (Bewkes 204). The only change is that 152 will not use the electroscopes, but they will use the metal spheres on an insulated base. Ask Jeff what's going on



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• Insulated spheres setup:

  

• Keep the intensity low on the oscilliscope. If it's too high, the effect is not as noticeble.
• Remove the plastic scale from the front of the oscilliscope display.