6. Disconnect the wire lead from the spring clip at the bottom of the
battery holder.
7. Click ‘Stop’ in Data Studio.

Calculation & Result:
Data
Record voltage values in the Table and in the diagram.
Voltage, A – B
Current, Point A
Current, Point B
Resistance,
Ω
Voltage, V
Current, A
R1 10 Ω
V
1
I
1
R2 4.7 Ω
V
2
I
2
R3 100 Ω
V
3
I
3
R4 4.7 Ω
V
4
I
4
R5 10 Ω
V
5
I
5
R
Total
V
A – B
I
Total
R1
R2
R4
R5
R3
A
B
R1
R2
R4
R5
R3
A
B
V
1
V
2
V
3
V
4
V
5
I
1
I
4
I
2
I
3
I
5

Calculation
1. using the schematic of the circuit, calculate the total resistance of the
circuit. Record the value in the Table.
2. Based on the calculated resistance and the voltage across A and B,
calculate the theoretical value of the current using Ohm’s Law.
Current (theoretical) = __________ A
3. Calculate the percent difference between the theoretical current and
the measured current:
%
diff
theoretical
measured
theoretical
100%
= ___________

Questions
1. Which resistors are in parallel? What do you observe about the voltages of resistors in parallel?
2. What is the total or supplied voltage of this circuit? How does this compare to the voltage drop across the resistors?
3. How does the voltage across R1 and R2 compare to the voltage across R4 and R5? How do you account for this result?
4. What is the value of the currents going into and out of junction A?
5. What is the value of the currents going into and out of junction B?
6. How many times greater is the value of the resistance of R1 versus R2? How does this affect the amount of current that flows through eachresistor?
1. What do the results suggest about the current coming into a junction and the current leaving a junction?

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- Fall '14
- Electronics, Current, Power, Electrical resistance, Electrical impedance, Kirchhoff's circuit laws, Voltage drop