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Laboratory 7: Network Theorems
201020
Laboratory #7:
Network Theorems
Objectives:
The purpose of this assignment is to study certain important network theorems, which are used
frequently in circuit analysis, and to improve skills in applying these to practical circuits. Ex-
perimental and analytical methods are compared.
Pre-Lab Preparation:
1. Review Thévenin’s Theorems for DC circuits and for AC circuits.
2. Review the Superposition Theorem.
Safety Precautions:
1. Set instruments to the highest scale setting before turning on power, and then adjust the
scale setting to produce the most accurate reading.
2. Check your circuit for correctness before you turn on the power. Recheck if you have the
slightest doubt.
3. Turn off the power before you make any circuit changes.
Equipment Needed:
DC power supply
Resistance decade boxes (2)
ECE Resistance Load Box (1) or Hampden RLC-100 (1)
Capacitance decade box
Digital multimeter
Function generator
Procedure:
1. Thévenin’s Theorem, DC circuit.
a) Construct the circuit shown. Measure the voltage across A-B; this is the Thévenin volt-
age, V
T
.
To obtain the 1kΩ, use a Resistance Load Box (either Hampden or ECE) with two
switches flipped up and four switches flipped down. [Note: Use a meter to check the re-
sistance to be sure it is correct before connecting to the circuit, since sometimes the inter-
+
–
4.7kΩ
2.2kΩ
10V
A
B
1kΩ
- ECE 2080 1
- Revision Notes 2
- Table of Contents 3
- Equipment 4
- Introduction 7
- 2010viii 8
- Memo Report 11
- Laboratory Reports 11
- Laboratory #1: 13
- Laboratory #2: 14
- Equipment Needed: 15
- Procedure: 15
- Laboratory #3: 16
- Computer Analysis 16
- OUTPUT OFF 17
- Laboratory #4: 20
- Instrument Characteristics 20
- Voltmeter 22
- Laboratory #5: 25
- Oscilloscope 25
- and 2 2 26
- Laboratory 5: Oscilloscope 27
- Laboratory #6: 28
- Laboratory #7: 32
- Network Theorems 32
- Laboratory #8: 35
- Problems: Phasors 35
- Laboratory #9: 37
- Laboratory #10: 38
- AC Measurements 38
- Laboratory Notebook: 39
- Laboratory #11: 40
- Laboratory #12: 41
- Digital Logic Circuits 41
- Appendix A 42
- Source of Electric Shock 43
- Protecting People 44
- Protecting Equipment 44
- Types of Equipment Damage 45
- After-Accident Action 45
- References 46
- Appendix B 47
- Oscilloscope Grounding Errors 49
- Autotransformer 51
- Connected to Building Ground 52
- Digital Multimeter 53
- LCR Meter 54
- Dual-Beam Oscilloscope 55
- Digital Storage Oscilloscope 56
- 3 30 36.0 66.9 58
- 58
- V t V t e V t 60
- 60
- Appendix C: Data Plots 61
- Appendix D 62
- Waveform Observation 63
- = 21.2 V 64
- Phase Angle Measurement 65
- Appendix E 68
- VOLTS/DIV 70
- Further reading 73
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