| Physics for the Inquiring Mind [Phys 105] Fall 2005 |
[1] You have a board of five mounted coils of wire in your kit. The five coils of wire are labeled (1) 10 meters of 22 gauge Copper wire, (2) 10 meters of 28 gauge Copper wire, (3) 20 meters of 22 gauge Copper wire, (4) 20 meters of 28 gauge Copper wire, and (5) 10 meters of 22 gauge Copper-Nickel wire.
By using the circuit below and varying which of the five coils of wire you use in your circuit, rank your five coils from lowest resistance to highest resistance.
What do your results imply about the effect of the length of a piece of wire on its resistance?
What do they imply about the effect of the gauge of a piece of wire on its resistance?
[2] Complete Experiment 4.8 on p. 413. Make all of your predictions before setting up the circuit!
[3] As Homework for Friday, October 7, do Exercise 2.3 on p. 392, Exercise 3.4 on p. 401, Problem 1.3 on p. 494, Problem 2.1 on p. 495, and Problem 2.2 on p. 495.