# AC Circuits

## Course Description

Introduction of capacitance, inductance, RC/RL transient response, sinusoidal waveforms, reactance and impedance, AC power, phasor analysis of RLC circuits, node voltage and mesh current analysis, superposition, Thevenin's and Norton's network theorems. Includes a 3-hour per week laboratory. Prerequisite: EET 111. Audit available.

## Intended Outcomes

Upon successful completion of this course, students will be able to:

1. Apply basic electrical DC and AC concepts and theorems to analyze circuits.
2. Build and troubleshootDC and AC electrical circuits and perform measurements with electronic test equipment.
3. Write technical reports using collected experiment data.
4. Use circuit simulation software to analyze AC circuits.
5. Identify the types of capacitors and inductors in a circuit, and what their electrical characteristics are in a DC or AC environment with respect to frequency, phase, ohms law, current and voltage.

## Outcome Assessment Strategies

Evaluation is by exams, homework, and lab work.

## Course Activities and Design

The determination of teaching strategies used in the delivery of outcomes is generally left to the discretion of the instructor. Here are some strategies that you might consider when designing your course: lecture, small group/forum discussion, flipped classroom, dyads, oral presentation, role play, simulation scenarios, group projects, service learning projects, hands-on lab, peer review/workshops, cooperative learning (jigsaw, fishbowl), inquiry based instruction, differentiated instruction (learning centers), graphic organizers, etc.

## Course Content (Themes, Concepts, Issues and Skills)

The student is expected to learn the following in the lab:

• Use the DMM (digital multi-meter) to measure AC voltage, and current.
• Use the Oscilloscope to measure AC waveforms in the time domain.
• Use the oscilloscope to measure phase angles between two AC waveforms.
• Use the function generator to generate sinusoidal waveforms of specific frequency and amplitude.
• Build circuits on a solder-less breadboard.
• Use the DC power supply.
• Use the spreadsheet and word processor to process lab data and to write lab reports.
• Use circuit simulation software to simulate circuits built in the lab.
1. Inductors
1. Inductance and the magnetic field.
2. Induced voltage RL circuit transient response.
3. Inductors in series and parallel.
4. Energy storage in an inductor.
2. Sinusoidal waveforms
1. Graphical and mathematical representation of a sinusoid.
2. Frequency spectrum
3. Phase relationships, average values, rms values.
4. AC measurements
3. Phasors and circuit elements in the phasor domain
1. R, L, and C response to sinusoidal voltages and currents.
2. Frequency response of R, L, and C circuit elements.
3. Complex numbers, rectangular and polar forms.
4. Conversion between polar and rectangular forms.
5. Complex number math and use of calculator.
4. Series, parallel, and Series-Parallel AC Circuits Reactance and Susceptance.
1. Impedance, Admittance, and the phasor diagram.
2. Series circuit, voltage divider.
3. Frequency response of series circuits.
4. Parallel circuit, current divider.
5. Frequency response of parallel circuits.
6. Series and parallel equivalent circuits.
7. Example by combining series and parallel concepts.
5. Analysis Methods and Theorems
1. Sources and source conversions.
2. Node voltage and mesh current methods.
3. Bridge networks.
4. Delta-wye and wye-delta circuits and conversions.
5. Superposition Theorem.
6. Tfhevenin’s and Norton’s Theorem.
7. Maximum power transfer theorem.
6. Capacitors
1. Electric field and capacitance.
2. Capacitors
3. Charging and discharging capacitors through a resistance.
4. RC time constant and the exponential function.
5. Capacitors in series and parallel.
6. Energy storage