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PIMA COMMUNITY COLLEGE
Effective Term: Spring 2014
TEC
121LB
Basic Electric and Magnetic Properties Lab
Credit Hours: 1.00
Lecture Periods:
Lab Periods: 3.00
Description:
This is the Lab portion of TEC 121. Introduction to AC, DC, and magnetic circuit theory. Includes passive
devices, terminology, basic laws, network calculations, electrical measurements, instruments, and units. Also
includes use of hand tools, safety, use of schematic and block diagrams, troubleshooting, and electronic circuit
applications.
Prerequisite(s): TEC 100 and 111.
Corequisite(s): TEC 121.
Course Learning Outcomes:
Upon successful completion of the course, the student will be able to:
1. Use the DC variable voltage source to supply a desired output voltage.
2. Connect voltage sources in series-aiding and series opposing.
3. Measure voltage using the DMM and VOM.
4. Measure resistance using the DMM and VOM.
5. Measure current in a circuit using the DMM and VOM.
6. Explain the IV characteristics of light bulbs, LEDs, and diodes.
7. Measure the voltage from ground to any point on the circuit.
8. Verify Kirchhoff's Voltage Law (KVL) and learn how to use KVL in simple series circuits.
9. Demonstrate how to use reference ground and explain the meaning of measuring voltages relative to
reference ground.
10. Construct a voltage divider circuit and demonstrate how voltage and current behaves in a voltage divider
circuit.
11. Recognize the effects of circuit loading when connecting a load to the output of the voltage divider circuit.
12. Build a circuit and demonstrate an RC or RL circuit in operation.
13. Compare measured values to theoretical calculations and verify Kirchhoff's current law (KCL).
14. Explain and demonstrate how voltage and current behaves in a series-parallel DC circuit, a
Wheatstone-Bridge circuit, a Zener regulator circuit, and a Common-Source (CS) JFET amplifier circuit.
15. Measure the Thévenin or Norton resistance of a circuit using an ohmmeter.
16. Measure the Thévenin voltage of a circuit using a voltmeter.
17. Measure the Norton current of a circuit using an ammeter.
18. Understand how to set the function generator to a given voltage, frequency, and waveform.
19. Measure the peak and peak-to-peak voltage using the oscilloscope.
20. Measure the voltage across the function generator and resistors using the oscilloscope.
21. Calculate current using the oscilloscope measured values of peak voltage.
22. Measuring capacitance using the DMM.
23. Demonstrate, using the appropriate measuring device, how voltage and current behave in an RC circuit.
24. Measure the RC time constant using the oscilloscope.
25. Troubleshoot and repair (or remedy) an electric or magnetic circuit using diagrams, hand tools, and
measurement equipment such as oscilloscope and multimeters as necessary in the process.
Outline:
I.
Electrical and Hand Tool Safety
A.
Shock
B.
Burns
C.
Ventricular fibrillation
D.
Eyes
E.
Cuts
F.
General precautions
II.
Basic Electricity
A.
Atomic structure
B.
Static electricity
C.
Sources of voltage and current
D.
Conductors and insulators
E.
Review of schematic symbols
F.
Energy cells
G. Energy converter
H.
Introduction to circuit simulation using computers
III. Representation of Units
A.
Scientific and engineering notation
B.
General prefixes
C.
Basic algebraic operations
D.
Systems of units
IV. Basic Direct Current (DC)
A.
Ohm's law
B.
Resistance and resistors
C.
Switches, fuses, and lamps
D.
Analog and digital multimeter operation
E.
Operation and use of DC power supplies
V.
Direct Current Circuits
A.
Series resistance
B.
Parallel resistance
C.
Series/parallel resistance
D.
Capacitors in DC circuits (blocking)
E.
Inductors in DC circuits (passing)
F.
Kirchhoff's laws
G. Superposition
VI. Electrical Power and Energy
A.
Energy production [chemical, solar, mechanical (ac and dc generators), thermal, pressure]
B.
Concepts of power [Watt’s law and power dissipation]
C.
Capacitor as storage element
D.
Inductor as storage element
E.
Resistor as power dissipation device
VII. Input and Output Impedance (Resistive cases only)
A.
Thévenin's theorem
B.
Norton's theorem
C.
Impedance matching
VIII. The Oscilloscope and Function Generator
A.
Operation and use of function generators
B.
Oscilloscope principles
C.
Basic oscilloscope functions
D.
Basic oscilloscope operation
IX. Alternating Current
A.
Frequency, period, and amplitude
B.
RMS, peak, peak-to-peak
C.
Sine, square, and triangular waveforms
X.
Capacitors and Capacitance
A.
Types of capacitors, dielectrics, and electric field
B.
Capacitors in parallel and series
C.
Capacitor current and voltage
D.
Capacitor failures and troubleshooting
E.
Capacitor charging and discharging
XI.
XII.
F.
RC timing application
G. Capacitive transient analysis
Basic Overview of Magnetic Considerations
A.
Flux and flux density
B.
Core types
C.
Magnetic units
D.
Basic magnetic circuits
E.
The solenoid
F.
The relay
Inductors and inductance
A.
Self-inductance
B.
Inductances in series and parallel
C.
Practical applications
D.
Inductor troubleshooting
E.
Inductive transient analysis