AC circuits – Cheap Research Essays

ELEC153 Circuit Theory II
M3A1 Textbook Assignment: Problem Set A: Chapter 16

Instructions

Save this document and place your answers into it so you can submit it to the appropriate homework dropbox. Handwritten solutions should be scanned and saved as a BMP, GIF, or JPG image, or scanned and pasted into this document.

Questions

1. Find the impedance of each circuit as seen from the open ended terminals, in polar form:

2. Consider the following AC series-parallel circuit:
a. Find the impedance of the circuit across the source, in polar form.
b. Find the current supplied by the source, in polar form. The source is 12 volts rms, at 0 degrees.
c. Find the voltage across each resistor, in polar form.
d. Find the real power supplied by the source, in Watts.

ELEC153 Circuit Theory II
M3A2 Textbook Assignment: Problem Set B: Chapter 16

Instructions

Questions
1. Consider the following AC series-parallel circuit:
a. Find the impedance of the circuit across the voltage source, in polar form.
b. Find the current supplied by the source, in polar form. The source is 20 volts rms, at 0 degrees.
c. Find the voltage across each resistor, in polar form.
d. Find the real power supplied by the source, in Watts.

2. Find Vab, in polar form:
ELEC153 Circuit Theory II
M3A3 Lab: AC Series-Parallel Circuit
Introduction

In this experiment we work with a series-parallel AC circuit. As always, we support our lab work with manual calculations. Once you trust the software and understand its functions and limitations, you eventually ease off performing the manual analysis. Keep in mind, however, that all of the circuits you work with in the lab have been developed and tested to make sure they provide meaningful results. If your manual calculations give different answers than MultiSim, and you have setup, simulated, and measured your results properly, what does that mean? Maybe you should check your manual calculations again. It is easy to miss a sign change, or forget to recalculate Xc or Xl when the frequency has changed.

Procedure

1. Setup the following circuit in MultiSim. The voltage source is 10 volts peak at 1000 Hz.

2. Run a Transient Analysis on the circuit in order to determine the peak current magnitude and phase shift. Record them here.

Measured Current
Measured Phase Shift

3. Determine the peak current and phase shift by calculation. Record them here. Do they match the measured current values? Explain.

Calculated Current
Calculated Phase Shift

4. Change the frequency of the voltage source to 5000 Hz. Re-simulate and perform a Transient Analysis to find the new circuit current and phase angle. Measure them and record them here:

Measured Current
Measured Phase Shift

5. Perform the manual calculations needed to find the circuit current and phase shift. Record the calculated values here. Do they match the measured values within reason? What has happened to the circuit with an increase in frequency?

Calculated Current
Calculated Phase Shift
6. Replace the capacitor with a 0.08 H inductor. Set the source frequency back to 1000 Hz. Perform Transient Analysis and measure the current amplitude and phase shift. Record them here:

Measured Current
Measured Phase Shift

7. Perform the manual calculations needed to find the circuit current and phase shift. Record the calculated values here. Do they match the measured values within reason?

Calculated Current
Calculated Phase Shift
Write-up and Submission

In general, for each lab you do, you will be asked to setup certain circuits, simulate them, record the results, verify the results are correct by hand, and then discuss the solution. Your lab write-up should contain a one page, single spaced discussion of the lab experiment, what went right for you, what you had difficulty with, what you learned from the experiment, how it applies to our coursework, and any other comments you can think of. In addition, you should include screen shots from the MultiSim software (press Alt-Print Screen while inside MultiSim and then paste the screen image into your lab document), and any other figure, table, or diagram as necessary.