ELEC153 Circuit Theory II M2A4 Lab: AC Parallel Circuits Introduction In this experiment we work with AC parallel circuits. As we did in the AC series circuits lab, the results obtained through Transient Analysis in MultiSim will be verified by manual calculations. Procedure 1. Figure 1 is the circuit we want to analyze.The voltage source is 24 volts peak at 1000 Hz. Figure 1: AC parallel circuit used for analysis using MultiSim Unlike the series circuit, there is no resistor in series with the voltage source that allows us to plot the current by taking advantage of its in-phase relationship. So, in order to measure the current produced by the source (total current) add a 1 Ohm resistor in series with the source. This small resistor will not affect the calculations. Figure 2: Arrangement for analyzing the current waveforms 2. Run the simulations and with the oscilloscope measure both the source voltage and the voltage across the resistor. You should get a plot similar to the following graph: Figure 3: Source voltage (red) and source current (blue) waveforms 3. From the resulting analysis plot, determine the peak current. Record it here. Measured Peak Current 4. Determine the peak current by calculation. Record it here. Does it match the measured peak current? Explain. Calculated Peak Current 5. Calculate the phase-shift. Using the method presented in the last lab, measure the time difference at the zero-crossing of the two signals. Record it here. Time difference 6. From the resulting calculation, determine the phase shift by using the following formula Record it here. Measured Phase Shift 7. Determine the phase shift by calculation. Record it here. Does it match the measured phase shift? Explain. Calculated Phase Shift 8. 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 9. 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 10. Replace the capacitor with a 0.8 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 11. 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 12. 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 13. 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 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 comment you can think of. In addition, you should include screen shots from the MultiSim software and any other figure, table, or diagram as necessary.

## ELEC153 Circuit Theory II M2A4 Lab: AC Parallel Circuits Introduction In this experiment we work with AC parallel circuits. As we did in the AC series circuits lab, the results obtained through Transient Analysis in MultiSim will be verified by manual calculations. Procedure 1. Figure 1 is the circuit we want to analyze.The voltage source is 24 volts peak at 1000 Hz. Figure 1: AC parallel circuit used for analysis using MultiSim Unlike the series circuit, there is no resistor in series with the voltage source that allows us to plot the current by taking advantage of its in-phase relationship. So, in order to measure the current produced by the source (total current) add a 1 Ohm resistor in series with the source. This small resistor will not affect the calculations. Figure 2: Arrangement for analyzing the current waveforms 2. Run the simulations and with the oscilloscope measure both the source voltage and the voltage across the resistor. You should get a plot similar to the following graph: Figure 3: Source voltage (red) and source current (blue) waveforms 3. From the resulting analysis plot, determine the peak current. Record it here. Measured Peak Current 4. Determine the peak current by calculation. Record it here. Does it match the measured peak current? Explain. Calculated Peak Current 5. Calculate the phase-shift. Using the method presented in the last lab, measure the time difference at the zero-crossing of the two signals. Record it here. Time difference 6. From the resulting calculation, determine the phase shift by using the following formula Record it here. Measured Phase Shift 7. Determine the phase shift by calculation. Record it here. Does it match the measured phase shift? Explain. Calculated Phase Shift 8. 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 9. 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 10. Replace the capacitor with a 0.8 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 11. 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 12. 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 13. 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 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 comment you can think of. In addition, you should include screen shots from the MultiSim software and any other figure, table, or diagram as necessary.

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Standard based Curriculum In standard based curriculum, the initial point … Read More...
2. Problem 7.2 The flyback converter of Figure 7.2a has an input of 48V, and output of 30V, a duty ratio of 0.45, and a switching frequency of 25kHz. the load resistor is 15Ω. a. Determine the transformer turns ratio b. Determine the transformer magnetizing inductance Lm such that the minimum inductor current is 25% of the average.

## 2. Problem 7.2 The flyback converter of Figure 7.2a has an input of 48V, and output of 30V, a duty ratio of 0.45, and a switching frequency of 25kHz. the load resistor is 15Ω. a. Determine the transformer turns ratio b. Determine the transformer magnetizing inductance Lm such that the minimum inductor current is 25% of the average.

Two wires each carry a current I=I=5 Amp to the left. The charge q is positive , has velocity v to the left , is directly between the two wires. 1) the net force on q zero, 2) If I is incresed to 10 amp, net force on q is down , 3) If wire 2 is moved higher up on the page, the net force on q is down. 4) If the current wire 1is reversed so that now I is to the right the net force on q is down , 5) If I and I are both incresed to 10 amp, the net force on q is zero.

## Two wires each carry a current I=I=5 Amp to the left. The charge q is positive , has velocity v to the left , is directly between the two wires. 1) the net force on q zero, 2) If I is incresed to 10 amp, net force on q is down , 3) If wire 2 is moved higher up on the page, the net force on q is down. 4) If the current wire 1is reversed so that now I is to the right the net force on q is down , 5) If I and I are both incresed to 10 amp, the net force on q is zero.

There are over 100 alleles known for the gene associated with cystic fibrosis. With current technology, it is possible to determine exactly which allele or alleles is/are carried by a person. What is the maximum number of different alleles that any person can carry?

## There are over 100 alleles known for the gene associated with cystic fibrosis. With current technology, it is possible to determine exactly which allele or alleles is/are carried by a person. What is the maximum number of different alleles that any person can carry?

Because there are two chromosomes, each with one locus for … Read More...
Nilsson & Riedel 9e, p. 348, Problem 9.12. The expression for the steady-state voltage and current at the terminals of the circuit seen in the figure are vg(t) = 300 V cos (5000  rad/s • t + 78°) ig(t) = 6 A sin (5000  rad/s • t + 123°) a) What is the impedance seen by the source? b) By how many microseconds is the current out of phase with the voltage?

## Nilsson & Riedel 9e, p. 348, Problem 9.12. The expression for the steady-state voltage and current at the terminals of the circuit seen in the figure are vg(t) = 300 V cos (5000  rad/s • t + 78°) ig(t) = 6 A sin (5000  rad/s • t + 123°) a) What is the impedance seen by the source? b) By how many microseconds is the current out of phase with the voltage?

What is the current is of the inverting-amplifier circuit shown in the figure if vs = 2.6 V, Rf = 26 kΩ, and Rs = 7 kΩ? (0 decimal in μA)

## What is the current is of the inverting-amplifier circuit shown in the figure if vs = 2.6 V, Rf = 26 kΩ, and Rs = 7 kΩ? (0 decimal in μA)

This assignment challenges you to analyze how two writers present arguments about a significant issue or topic. For this assignment, you will choose two current newspaper or scholarly journal articles that focus on a current issue relevant to the people on the continent of Africa, and/or people of African descent. Your goal is to identify the purposes and claims of each author, locate their arguments in a rhetorical situation, and analyze the appeals each writer makes to support their argument. You will then evaluate the arguments: which author better satisfies their readers? Which author crafts the more fitting response? In sum, then, the main goals are: 1. Identify the purposes and claims that two authors make about a significant issue. 2. Locate the arguments in a rhetorical situation (what exigencies do the authors address? What constraints and resources exist for the authors? To whom are they writing? When and where was each article published? 3. Analyze the appeals (logical, ethical, emotional) put forth by the writers. 4. Evaluate the arguments. Which argument is more fitting? Which author better satisfies readers? (Your evaluation need not be either/or: maybe one author is more effective logically, for instance, while the second author is more effective ethically and emotionally.)

## This assignment challenges you to analyze how two writers present arguments about a significant issue or topic. For this assignment, you will choose two current newspaper or scholarly journal articles that focus on a current issue relevant to the people on the continent of Africa, and/or people of African descent. Your goal is to identify the purposes and claims of each author, locate their arguments in a rhetorical situation, and analyze the appeals each writer makes to support their argument. You will then evaluate the arguments: which author better satisfies their readers? Which author crafts the more fitting response? In sum, then, the main goals are: 1. Identify the purposes and claims that two authors make about a significant issue. 2. Locate the arguments in a rhetorical situation (what exigencies do the authors address? What constraints and resources exist for the authors? To whom are they writing? When and where was each article published? 3. Analyze the appeals (logical, ethical, emotional) put forth by the writers. 4. Evaluate the arguments. Which argument is more fitting? Which author better satisfies readers? (Your evaluation need not be either/or: maybe one author is more effective logically, for instance, while the second author is more effective ethically and emotionally.)

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