Circuit problems.

1. Distinguish between V, I, R and P.  (P is power - we did not yet chat about that, but it's in the notes.)

2. Give the units for each above.

3. What's Ohm's law?

4. If a 9-V battery is connected to a 2-ohm resistor, how much current flows through the resistor?

5. What's the difference between series and parallel circuits?

6. What exactly is a circuit?

7. Consider identical bulbs in series - how does the brightness change (if at all) as more bulbs are added in series?

8. Answer this question for bulbs in parallel.

9. 2 bulbs in series vs. 2 bulbs in parallel - how do the brightnesses compare?

10. Draw the schematic symbols for battery, wire and resistor.

11. What has more resistance: 2 resistors in series or the same 2 resistors in parallel?

12. Determine a suitable analogy for V, I, and R.

13. Bulbs in series vs bulbs in parallel: if one is unscrewed in either case, what happens to the other bulbs (do they get brighter, go out, or is there no change)?