Go to https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc and click on Download and then Run. Drag circuit elements from the carousel on the left into the play area. Connect them together by overlaying the dashed circles. Clicking on the connections allows you to cut them. Delete circuit elements by clicking on them and then selecting the trash can. You are encouraged to play freelyin a simulation you can't hurt anything (neither the equipment nor you!). Activity 4 | Resistance (Adapted from PhET Colorado2) Resistance R impedes the movement of charges in the circuit. In the carousel you have resistors whose job is to accomplish this. Resistors dissipate thermal energy when there is current in them. The bulbs are merely resistors that get hot enough to glow; for this reason, bulbs can function as visible current indicators if you don't have an ammeter (although their own resistance changes the current in the circuit). The SI unit of resistance is the ohm with symbol .

e. Guess/predict a rule for the equivalent resistance of a given set of resistors in parallel.

f. Connect two or three resistors in parallel and connect that combination in series with a bulb and a battery. How does the brightness of the bulb change as you change the resistance of the resistors or add more resistors in parallel?

g. What does the ammeter say about the current in each different resistor in parallel?

h. What does the voltmeter say about the voltage across each of the resistors in parallel?