Ohm's Law prac

In this activity you will use the different setting on the power supply to take reading of voltage and current across an unknown resistor. You will create your data using the phet virtual lab. You can watch this video for instructions on getting started.

Set up the following circuits

Set up a two tables in excel as shown below for each circuit

Take reading for the 0 - 40 V setting on the variable power supply and then create a plot of your reading V vs I.

change the component to the globe and then the pencil.

a) Describe the shape of your graph

b) find the gradient of your graph

c) How does you data relate to Ohm's Law?

d) Check the resistance of the resistor/globe/pencil

d) How does your gradient compare to the known resistance?

e) How could you improve this result?