Circuit Analysis Labs to Accompany: Circuit Analysis Theory and Practice Fifth Edition – A.H. Robins and W.C. Miller Student Name: _________________________ LAB 11 – AC Circuits Objectives: After completing this lab you will be able to - Create and observe RL and RLC circuits AC response - Demonstrate basic measurements using oscilloscope Required Equipment: - Oscilloscope, - AC power supply, Components: - Breadboard, Wire Strippers and 22awg Wire, - Resistors, 1KΩ X1 - Capacitors, 1µF X1 - Inductors, 1mH X1 Reference: Oscilloscope presentation, Chapter 15, Chapter 16, Chapter 17 Circuit Analysis Labs to Accompany: Circuit Analysis Theory and Practice Continued … LAB 10 – RL and RLC Circuits, Steady State Response Lab Schematic: Part A – RC Circuit Procedure: Part A Calculations: in circuit of Figure L11-1, find the voltages at nodes A and B. Using these voltages, find the voltage across each impedance. Using calculated voltages, amplitude across each resistor and the capacitor, find the amplitude of current for each impedance. Experiment: Assemble the circuit of Figure L11-1. Using oscilloscope, apply a sinusoidal input with amplitude of 5v and measure voltages at nodes A and B for 500 Hz, 1 KHz and 5 KHz frequencies. AC C1=1µF R1=1kΩ A B Figure L11-1 AC response of the RC circuit. For the 1 KHz input, on oscilloscope, observe voltages at nodes A and B at the same time and measure the phase difference between them. Draw the XY (also called Lissajous) curve by applying node A to X input and Node B to the Y input of the oscilloscope and change the horizontal mode to XY. Draw the XY (Lissajous) graph. Voltages Frequency Amplitude Average RMS Node A 500 Hz Node B Node A 1 KHz Node B Node A 5 KHz Node B Impedance Frequency Voltage Amplitude Voltage Effective R1 500 Hz C1 R1 1 KHz C1 R1 5 KHz C1 Circuit Analysis Labs to Accompany: Circuit Analysis Theory and Practice Continued … LAB 10 – RL and RLC Circuits, Steady State Response Continued… Lab Schematic: Part B – RL Circuit Procedure: Part B Calculations: in circuit of Figure L11-2, find the voltages at nodes A and B. Using these voltages, find the voltage across each impedance. Using calculated voltages across each resistor and the inductor, find the current of each impedance. Experiment: Assemble the circuit of Figure L11-2. Using oscilloscope, apply a sinusoidal input with amplitude of 5v and measure voltages at nodes A and B for 100 KHz, 1 MHz and 5 MHz frequencies. AC R1=1kΩ A B L1=1mH Figure L11-2 AC response of the RL circuit. For the 5 MHz input, on oscilloscope, observe voltages at nodes A and B at the same time and measure the phase difference between them. Draw the XY (also called Lissajous) curve by applying node A to X input and Node B to the Y input of the oscilloscope and change the horizontal mode to XY. Draw the XY (Lissajous) graph. Instructor’s Initials: _____________________ (MM/DD/YY): _____ / _____ / ______ Voltages Frequency Amplitude Average RMS Node A 100 KHz Node B Node A 1 MHz Node B Node A 5 MHz Node B Impedance Frequency Voltage Amplitude Voltage Effective R1 100 KHz L1 R1 1 MHz L1 R1 5 MHz L1

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