How about a short assignment for a short week:

Read chapter 34

1. Why don't the birds on the powerlines of the first page get electrocuted?

2. Imagine that you could get so small that you could enter the metallic crystal lattice of a piece of copper wire. Imagine that an electron could be "seen" by an observer of that size. What would you "see" if the wire that you were in experienced a positive potential to your left and a negative potential to your right?

3. What has more resistance -- a wire of .001 m in radius or a wire of .0005 m (half the radius) -- assume each is one meter in length?

4. What has more resistance -- a wire of .001 m radius and 1 meter of length or a wire of .001 m radius and 5 meters of length?

5. What is the resistance where a 2 Amp current is driven by 12 V of potential difference?

6. What is the potential difference where 3 A is driven through a 5 Ω resistor?

7. What current does a 12 V battery produce in a 6 Ω resistance?