Course: HET 119 HVACR Electricity II

Lab Assignment

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Week 3 Lab Assignment: Series and Parallel Circuits

Recommended Materials
1. VOM Meter
2. Lab Sheet
3. Pencil
4. 24” x 24” Board
5. Electrical Wires
6. Three Light Bulbs with light fixtures
7. Switch and fuse

Scope

This lab will help the student to learn how to read volt, resistance, and amperage both mathematically and physically. Also, the student will develop series and parallel circuits.

Procedures

1. Have instructor give you the supplies needed for this lab.
2. Your instructor will assign you equipment to work on.
3. On the test board, install three lights in series.
4. Measure the voltage drop at each light bulb.
5. Use a clamp-up amp-meter and measure the current at each light bulb.
6. Take the same test board and bulbs, build a parallel circuit.
7. Measure the voltage drops at each light bulb.
8. Turn the power off.
9. Measure the total resistance of the parallel circuit.

Research Questions

1. What was the voltage at each light bulb in the series circuit? Why?
2. What was the amperage at each light bulb?
3. What was the total amperage of the series circuit? Was there a difference in the amperage compared to the total and individual loads? Why?
4. In the parallel circuit, what was the voltage reading at each light bulb?
5. What was the total voltage reading? Was there a difference in these reading? Why?
6. How did the amperage vary from the total and the individual readings in the parallel circuit?
7. Mathematically use the rules of parallel circuits to determine the resistance of this parallel circuit.
8. Use Ohm’s Law to determine the current of this parallel circuit.
9. Were the amps the same as the ohm’s law answer?

Click on the file below to download the Lab Assignment
- HET 119 Wk 3 Lab.docx (15.34 KB)