Circuit problems - 1

1.  Describe the difference between voltage, current and resistance.  Give the proper units, too.

2. 10 coulombs of charge flows past a point in a circuit in 5 seconds. What is the current?

3.  What is the resistance of a light bulb that allows 2 A of current through it when connected to a 12-V battery?

4. A 5-ohm resistor is connected to a 10-volt battery. What current passes through the resistor?


These problems are based on material we will cover next class.

5. Two 100-ohm resistors are in series. What is their total resistance?

6.  In general, what is the difference between resistors in series and in parallel?  Recall the light bulb examples.

7.  Which has more resistance, 2 identical bulbs in series or the same 2 identical bulbs in parallel?

8.  For question 7, which set-up (series or parallel) would kill the battery quicker?

9.  You have 2 bulbs in series - remove one (unscrew it) and what happens?

10.  You have 2 bulbs in parallel - remove one (unscrew) and what happens?

11.  Draw the symbols for battery, resistance and wire.