Ecet 110 Success Begins / snaptutorial.com

ECET 110 Quiz 2
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1. (TCO 4) For the series-parallel circuit given in Figure 3.1 below,
determine the total resistance RT between the terminals labeled A and B
2. (TCO 4) For the circuit given in Figure 3.3, obtain the following
quantities.
a) Currents I1 and I2
b) Power dissipated by the resistor R3
3. (TCOs 2,3,4) Determine the unknown quantities I1, V2, and V3 for
the series-parallel circuit given in Figure 3.4 below. Note that some of
the known quantities are indicated in the diagram.
4. (TCOs 2,5) Solve for the loop currents I1, I2, and I3 for the circuit
given in Figure 4.5 below using format mesh analysis.
5. (TCO 5) For the circuit given in Figure 4.7 below, find I1, I2, and Vs.
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ECET 110 Quiz 3

1. (TCO 7) For the circuit given below, determine the total capacitance
CT between the terminals labeled A and B.
2. (TCO 6) Find the Thevenin equivalent circuit for the circuit given in
Figure 4.7 below. Consider the resistor R to be the variable load resistor.
Determine the current through R when R=75 ohms and also when R=25
ohms.
3. (TCO 7) For the RC circuit given below, determine the steady state
voltage across the capacitor and the peak current through the capacitor
during its charging cycle
4. (TCO 7) For the RC circuit given below, determine the time constant
and transient time, and determine the voltage across the capacitor at a
time t = 7 seconds
5. (TCO 6) Using superposition, find the voltage VR2 for the circuit
below
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ECET 110 Week 1 Homework

Why do you never apply an ohmmeter to a live network?
What is the voltage across a 220 Ω resistor if the current through it is 5.6
mA?
What is the current through a 6.8 Ω resistor of the voltage drop across it
is 24V?
What is the power delivered by a 6V battery if the current drain is
750mA?
The current through a 4k Ω resistor is 7.2mA. What is the power
delivered to the resistor?
Chapter 5
Find the individual (not combination of) elements (voltage source and/or
resistors) that are in series.
Find total resistance Rt for each configuration.
For the series configuration in Fig. 5.92, constructed of standard values:
For the series configuration in Fig. 5.93, constructed using standard
value resistors:
For the circuit in Fig. 5.97, constructed of standard value resistors:

Find the unknown quantities for the circuit of Fig. 5.98 using the
information provided.
Using Kirchhoff’s voltage law, find the unknown voltages for the
circuits in Fig. 5.105.
Use the voltage divider rule, find the indicated voltages in Fig. 5.111.
Using the voltage divider rule or Kirchhoff’s voltage law, determine the
unknown voltages for the configurations in Fig. 5.112. Do not calculate
the current!.
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ECET 110 Week 1 iLab Analysis of a Series
Circuit using Simulation and Actual
Construction
Objectives: To construct a circuit in series to test and verify Ohm’s Law
and Kirchhoff’s Voltage Law using a multi-meter, breadboard, resistors
and jumper wires. To simulate this construct digitally and

mathematically to compare results to determine if the above laws are
supported.
Results: The simulation, breadboard construct, and calculations had
similar measurements in all fields including voltage, current, resistors,
sources, and power dissipation.
Conclusions: Ohm’s Law and Kirchhoff’s Voltage Law hold accuracy
to the actual measurements with small discrepancy. The readings were
similar in all mediums.
Did you prove Ohm’s Law to be true for a series circuit?
Explain how you proved Ohm’s Law.
Did you prove Kirchhoff’s Voltage Law to be true?
Explain how you proved Kirchhoff’s Voltage Law.
What would happen to the current IT if one of the resistors, like R3 is
SHORT circuited by chance? Will the current, compared to the original
value:
What is the power dissipated by each resistor under the new
circumstances (R3 SHORTED)? Also, express your answers in
engineering units.
Under the above conditions, do we need to change the ratings of the
resistors?
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CHAPTER 6
4. For each circuit board in Fig. 6.74, find the total resistance between
connection tabs 1 and 2.
10. For the network of Fig. 6.80:
24. Using Kirchhoff’s current law, determine the unknown currents for
the parallel network in Fig. 6.93.
32. For each network of Fig. 6.101, determine the unknown currents.
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ECET 110 Week 2 iLab Analysis of a DC
Parallel Circuit using Simulation and Actual
Construction
Objectives:
The objectives this week were to effectively learn to simulate and
construct a parallel circuit and learn to troubleshoot issues that may be
had by OPEN or Shorted circuits. Also to learn how to calculate current
and resistance within parallel circuits
Did you prove Kirchhoff’s Current Law to be true for a parallel circuit
Explain how you proved Kirchhoff’s Current Law.
How much power did this circuit dissipate?
What would happen to the current I5 if one of the resistors, like R4,is
SHORT or OPEN circuited by chance? Will the current, compared to the
original value:
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ECET 110 Week 2 Quiz
1. (TCO 3) Find the total conductance and total resistance of the parallel
circuit given below.
2. (TCO 3) A resistor in one of the parallel branches is replaced by a
short circuit as shown in the figure below. Determine the current IS
through this shorted branch.
3. (TCO 3) Solve for the unknown currents using the information
provided in the figure below. (Hint: use the current divider rule.)
4. (TCO 3) Determine the unknown quantities for the parallel circuit
below. Note that the known quantities have a value assigned to them.
5. (TCO 3) Given a parallel electric circuit as shown below, determine
the currents I1, I2, I3, I4, and IT. Verify Kirchhoff's current law and
determine the power PR1 dissipated by the resistor R1.
6. (TCO 2) Given a series electric circuit as shown in the figure below,
determine the following quantities
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Chapter 7: Problems 1 (a, b, c), 2 (a, b), 3, 8, 10
1. Which elements (individual elements, not combinations of elements)
of the networks in Fig. 7.60 are in series? Which are in parallel? As a
check on your assumptions, be sure that the elements in series have the
same current and that the elements in parallel have the same voltage.
Restrict your decisions to single elements, not combinations of elements.
2. Determine RT for the networks in Fig. 7.61.
3. Find the total resistance for the configuration of Fig. 7.62.
8. For the network of Fig. 7.67:
10. For the circuit board in Fig. 7.69:
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ECET 110 Week 3 iLab Analysis of a DC Series-
Parallel Circuit
Objectives:
To construct a series-parallel circuit correctly and measure its equivalent
resistance.
To predict and verify electrical characteristics of a series-parallel circuit
using Ohm’s Law, Kirchhoff’s Current and Voltage Laws, and Voltage
and Current divider rules.
Determine the various branch currents in the circuit using the current
divider rule. Verify the same using the simulation and actual
measurement after wiring the circuit. Report on any differences in the
values and why that might be the case.
Did you prove Kirchhoff’s Voltage Law to be true for the series-parallel
circuit?
Explain how you proved Kirchhoff’s Voltage Law.
Did you prove Kirchhoff’s Current Law to be true for the series-parallel
circuit?
Explain how you proved Kirchhoff’s Current Law.

How much power did this circuit dissipate?
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Objectives:
1. To troubleshoot a complex circuit and determine various currents and
voltages using format mesh analysis.
2. To simulate the complex circuit in MultiSim and record the required
quantities.
3. Determine the various currents and voltages after wiring the circuit.
Results:
The results were as predicted.
Conclusions:
Using mesh analysis to predict complex circuits saves on lengthy
calculations

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ECET 110 Week 4 iLab Format Mesh Analysis
Objectives:
1. To troubleshoot a complex circuit and determine various currents and
voltages using format mesh analysis.
2. To simulate the complex circuit in MultiSim and record the required
quantities.
Results:
The results were as predicted.
Conclusions:
Using mesh analysis to predict complex circuits saves on lengthy
calculations

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CHAPTER 9
1a. Using the superposition theorem, determine the current through the
12 Ohm resistor of fig. 9.119. we will use superposition to analyze this
circuit. First short E2 and find the current thru the 12 Ohms resistor and
then Short E1 and keep E2 in the circuit and find the same current. Then
algebraically add the two currents (add if in the same directions and
subtract if opposite direction
Short V2
12Ohms resistor—IR3
IR1 and IR3 are the same value
IR3=4A
Short V1
12 Ohms resistor—IR3

IR3=5A
Subtract the values due to opposing directions
IR3=IR3(V1)+IR3(V2)=5A-4A=1A
1b. Convert both voltage sources to current sources and recalculate the
current to the 12 Ohm resistor.
Subtract the two current sources (because they are opposite directions)
and the result will be one current source. You can find individual
currents using current divider rule
1c. How do the results of parts a and b compare?
The answers are to be the same.
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ECET 110 Week 5 iLab Thevenin’s and
Superposition Theorem

Objectives: 1. To troubleshoot a complex circuit and determine various
currents and voltages using superposition theorem and compare the
results with the results of last week’s lab.
2. To simulate the complex circuit in Multisim and record the required
quantities and verify superposition theorem by using one source at a
time.
Verify superposition theorem and report on any differences in the values
and why that might be the case.
4. Use Multisim to illustrate Thevenin’s theorem.
Results: By collecting the required data from calculated, simulated, and
constructed circuits, we were able to prove the superposition theorem to
be true.
Conclusions: The superposition theorem is a true and viable way to
calculate the electrical values of a circuit with multiple power sources.
Given the current through R1 from each source indicated by IR1(V1)and
IR1(V2), would the net current through the resistor be obtained by
adding or subtracting these individual current contributions?
If R2 failed due to an overload and the resistor opened up, what voltage
would you measure across R2?
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ECET 110 Week 6 Homework Capacitors
Chapter 10: Capacitors
20. Repeat Problem 19 for R = 1 MΩ, and compare the results
26. For the network in Fig. 10.98, composed of standard values:
34. For the automobile circuit of Fig. 10.105, VL must be 8 V before the
system is activated. If the switch is closed at t = 0 s, how long will it
take for the system to be activated?
48. Find the total capacitance CT for the circuit in Fig. 10.119.
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ECET 110 Week 6 iLab Transient Analysis of a
Resistor-Inductor Circuit

1. OBJECTIVES
Perform a transient analysis on a Resistor-Capacitor circuit, and measure
capacitor charge
and discharge times.
Determine the steady state values of current, voltage, and the time
constants for a Resistor-Capacitor circuit.
PARTS LIST
Equipment:
IBM PC or Compatible
DC Power Supply
DMM (Digital Multimeter)
Oscilloscope
Parts:
1 – 10kW Resistor (color bands = brown, black, orange, gold), ¼
W
1 - 100μF electrolytic capacitor
1 – Breadboard and hookup wires
Software:

Multisim
III. PROCEDURE:
Theoretical calculations of the time constant, voltage, current, and the
duration the transients last for the sample RC circuit given in Fig. 6.1
below.
________________
For this question, assume that you are using Figure 6.1 but that the value
or R and C are unknown. Assume the time constant for the circuit is 10
ms (milliseconds). If the new R is half of the original R and capacitor C
is increased by 10 times, calculate the new time constant.
Using the exponential formula for a charging circuit and assuming an
initial voltage of zero volts across the capacitor, calculate the voltage
across the capacitor at
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ECET 110 Week 6 Quiz

1. (TCO 7) For the circuit given below, determine the total capacitance
CT between the terminals labeled A and B
2. (TCO 6) Find the Thevenin equivalent circuit for the circuit given in
Figure 4.7 below. Consider the resistor R to be the variable load resistor.
Determine the current through Rwhen R=100 ohms and also when R=50
ohms.
3. (TCO 7) For the RC circuit given below, determine the steady state
voltage across the capacitor and the peak current through the capacitor
during its charging cycle
4. (TCO 7) For the RC circuit given below, determine the time constant
and transient time, and determine the voltage across the capacitor at a
time t = 3 milliseconds
5. (TCO 6) Using superposition, find the voltage VR2 for the circuit
below.
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Chapter 11: Inductors
Homework problems [12, 14, 29, 36]
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ECET 110 Week 7 iLab Transient Analysis of a
Resistor-Inductor Circuit
Objectives:
Calculate time constant, transient time, current and voltage across
inductor at beginning and the end of the charge cycle.
Use MultiSim to test the calculations.
Build and test a physical circuit using the MultiSim schematic.

How does the self-resistance of the inductor affect the results?
What can be done to keep the current value to be the same as in the case
of an ideal inductor?
How can the inductor in MultiSim be “redesigned” so that it more
closely approximates the real inductor?
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