Title: Part Two - Ohm's Law
Course: Open ELT106 Fundamentals of DC/AC > Section: MODULE 2: Basic Circuits & Materials, Energy, and Electricity

Note: The following lab is available within this attachment and you may download and add your answers to the lab on the attached. Module Ohm's Law Lab
Purpose: To use a single resistor network and a 9VDC source to verify:
a) How resistors determine current
b)  Ohm’s Law

Procedure:

1) Using the resistor color code select the five resistors specified a) through e) in the test circuit:

TEST CIRCUIT

a) R1 = 330Ω

b) R1 = 1.5kΩ

c) R1 = 5.1kΩ

d) R1 = 22 kΩ

e) R1 = 100kΩ

2) Measure and record the values to two decimal places using the Ohm-meter function of your digital multi-meter. Monitor your source voltage often  source voltage often during this lab and record any change in source voltage.

a) R1 = 330Ω  Measured value= _________

b) R1 = 1.5kΩ Measured value= _________

c) R1 = 5.1kΩ Measured value=_________

d) R1 = 22 kΩ Measured value=_________

e) R1 = 100kΩ Measured value=_________

3) Place each resistor in turn in the test circuit shown. Measure the current drawn by each resistor using the ammeter function of your digital multi-meter. Caution Use the ammeter scale setting procedure in chapter 2, page 38 of your text. Record these currents as follows:

a) R1 = 330Ω  Current value= _________

b) R1 = 1.5kΩ Current value= _________

c) R1 = 5.1kΩ Current value=_________

d) R1 = 22 kΩ Current value=_________

e) R1 = 100kΩ Current value=_________

4) Using Ohms Law calculate the predicted current using   the source voltage and your measured resistance. Quantitatively compare these theoretical values of current with your measured values of current.

Results: (Use a second page)

1) Compare your measured and calculated results       in a table

2) Did your experiment verify Ohm’s Law?  How?

Conclusions:     (Use a second page)

1) Comment on the success/non-success of your experiment.

2) What were some of the sources of error in this experiment?

3) What was the most important thing you learned from your observations?

FACET Lab Exercise:  Now perform the DC Fundamentals Circuit Block labelled Ohm's Law in the mobile lab.