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Basic Idea:

• Examine effects of voltage and current for parallel and series circuits. Also, examine open and short circuits.

• 6

	What:	How Many:	Where:
New this week:
	Single pole knife switch	1	non-Majors storeroom, shelf M3
	Banana-to-Pin adapters (for the knife switch)	2	Majors storeroom, shelf B2
	Wire (need more wires this week)	9 6 – 24" 3 – 12"	104 Lab
	75 Ω resistor (brown)	1	non-Majors storeroom, shelf L4
	68 Ω resistor (light blue/green)	1	non-Majors storeroom, shelf L4
	AC incandescent bulb	2 (of same wattage)	non-Majors storeroom, shelf M3
Left over from last week:
	Blue Variac	1	non-Majors storeroom, shelf L6
	Widow maker	1	non-Majors storeroom, shelf L6
	AC bulb socket	2	non-Majors storeroom, shelf L2
	Digital multimeter	2	Majors storeroom, shelf A3

Computers Needed?

• No.

• This experiment uses the same basic setup as last week, with a few minor additions. Use the three short wires for the three ammeters (either one digital and two analog, or three analog).

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• Lab setup (see this page for photo details):

  

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• Attach the banana–to–pin adapters to the knife switch:

  

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• Setup for short circuit of bulbs in series (to be assembled by students):

  

©	St. Lawrence University	Department of Physics

Revised: 11 Jan 07

Canton, NY 13617