PART I
1) Use the PhET to create the circuit shown with one
battery and one resistor.
2) Place an ammeter at Point B.
Keeping the battery at 10V, change
the resistance to the following values
and record the current for each
resistance
3) Describe the relationship between voltage, resistance and current.
Does is match up with Ohm’s Law?
4) With the resistance set to 10 Ω, find the current at the three points (A, B, & C)
(Use the built-in ammeters)
5) Describe how the current behaves at different points around the circuit.

PART II
6) Create the new circuit as shown.
(one battery and two resistors ‘in series’)
7) Before taking any measurements: Based on earlier
results, what do you expect the current at A, B & C to
compare to each other?
8) Find the current at A, B, & C. Is it what you expected?
(if not, no big deal)
9) Use the built in voltmeter to find the voltages
between:
a) from A to B (i.e. the voltage across the 1st resistor)
b) from B to C (i.e. the voltage across the 2nd resistor)
10) How do the voltages found in the last question compare to the voltage of the battery?

PART III
11) Create the new circuit as shown.
(one battery and two resistors ‘in parallel’)
12) Measure the current at A, B, & D.
How are the currents related to each other?
13) Find the current at B & C. Is it what you expected?
14) Use the built in voltmeter to find the voltages between:
a) from B to C (i.e. the voltage across the 9 ohm resistor)
b) from D to E (i.e. the voltage across the 9 ohm resistor)
15) How do the voltages found in the last question compare to the voltage of the battery?

PART IV
16) Create a circuit in PhET based
on the image shown.
17) Take a SCREENSHOT of the
circuit you created (or take a
pic with your phone)
18) Find the voltage across each
of the resistors.
19) Describe the relationships
between all of the voltages
(the ones across the resistors
and the battery)
20) Find the following currents:
a) through each resistor
b) through the battery
21) Describe the relationship
between the currents found in
the last question