ECT 122 Week 5 iLab #1
Parts:
Breadboard
DC Power Supply
Hand Held DMM
Test leads
Wire
100 resistor, 120 resistor, 220 resistor, 330 resistor
1. Identify each of these circuits.
Series circuits connected in parallel
Parallel circuits connected in series
2
13.
Calculate the minimum acceptable power rating for the resistor in Figure 3.25a. I = V / R
6V/120=0.05A
14.
Calculate the minimum acceptable power rating for the resistor in Figure 3.25b. : I = V / R 8/16= 0.5A
21.
Complete the following chart.
Current
ECT122: Week 2 iLab #2
Part 1
Never connect the Positive (+) lead of a power supply to the ground. Connect the
negative lead of the power supply to the circuit FIRST. Then, connect the positive
lead.
Parts:
Breadboard
DC Power Supply
Hand-Held DMM
Test le
11.Determine the potentiometer setting needed to set the current in Figure 4.33a to 18 mA.
I=
Vs
R1
10V
470 = 47mA
=
I=
Vs
R2
10 V
100
=
= 10mA
R1 = 10V 18mA = 180k
12Determine the potentiometer setting needed to set the current in Figure 4.33b to 27 mA.
Show all work.
3. Calculate the component voltages and branch currents for the circuit shown in Figure 6.40, along with
the values of IT and RT. IT = IA + IB = 2mA + 2.6mA = 4.6mA RT = RA RB = 13k 10k =5.65k
FIGURE 6.40
RA = R1 + R2 = 10k + 3k = 13k IA =
ECT 122 Week 1 iLab #3
Parts:
Breadboard
Handheld DMM
DC power supply
Test leads
Resistor kit
1. List the functions available on the Amprobe AM-530 Digital Multimeter handheld
(DMM). It has True-rms, AC Voltage, DC Voltage, AC Current, DC Current,
Resista
ECT 122 Week 1 iLab #2
Part 1
1. Calculate the conductance of the following resistors:
Note: dont forget the units!
108,342,000 = 108.342 x 103 = 108.342 k
G=
G=
G=
Resistance
Conductance
108,342,000 = 108.342 k
9.230 S
10 k
100.0 S
2.2 k
4.600 mS
1
1
1
=
ECT 122 Week 7 iLab #3
1. Define the following.
Peak value: The peak value of a waveform is the maximum value reached by either of
its alternations.
Peak-to-Peak value: The peak-to-peak value of a waveform equals the difference
between its positive and ne
ECT 122 Week 4 iLab #3
Parts:
Breadboard
DC Power Supply
Handheld DMM
Test leads
Wire
1.2k resistor
3.3k resistor
4.7k resistor
1. Calculate the current in each branch of the parallel circuit below.
IT1=_10.793mA_ IR1=_1.702mA_
IR2=_2.424mA_
IR3=_6.667mA_
ECT 122 Week 3 iLab #2
Parts:
Breadboard
DC power supply
RT = R1 + R2 + R3 + R4
RT = 1k + 2.2k + 3.3k + 1k =
RT = 7.5k
VS
10 V
IT =
=
= 1.33mA
RT
7.5 k
VR1 = IT x R1 = 1.33mA x 1k = 1.33 V
VR2 = IT x R2 =1.33mA x 2.2k = 2.93V
VR3 = IT x R3 =1.33mA x 3.3k
ECT 122 Week 5 iLab #3
1. Determine the load voltage by deriving an equivalent circuit for the circuit below.
Reduce the R1, R2, and R3 combination to a single equivalent resistance. Also,
reduce R4 and RL1 to a single resistance.
RA = R1 + R2 = 470 + 220
ECT 122 Week 3 iLab #3
Parts:
Breadboard
DC power supply
Handheld DMM
Test leads
Wire
1.0k resistor
1.2k resistor
3.3k resistor
10k potentiometer
1. Using the circuit below, calculate the anticipated voltage drops across each resistor
and record them belo
1.
One coulomb of charge passes a point every 20 seconds. Calculate the value of the current through the
point. I =
Q
t
=
1
20
= 1/20 = 0.05 coulombs per second
2.
A total charge of 2.5 10-3 C passes a point every 40 seconds. Calculate the value of the cu
Chapter 7, Circuit Analysis Techniques, Practice Problems: 15, 16, 17, and 18
15. Derive the Thevenin equivalent of the circuit shown in Figure 7.47a.
FIGURE 7.47
16. Derive the Thevenin equivalent of the circuit shown in Figure 7.47b
VTH = VS
R3
R 1+R 2+
ECT 122 Week 4 iLab #2
Parts:
Breadboard
DC Power Supply
Hand Held DMM
Test leads
Wire
220 resistor
560 resistor
1.0k resistor
1. State Kirchhoffs Current Law. Kirchhoff's Current Law states that the algebraic sum
of the currents entering a node is equal
ECT122 Week 6 iLab #1
1. Define troubleshooting.
Troubleshooting is the process of locating faults in a circuit or system. When a circuit
doesnt operate as expected, Ohms law is one of the best tools you have to help
diagnose the problem. For example, Ohm
Chapter 5, Parallel Circuits, Practice Problems: 15, 38
Chapter 6, Series-Parallel Circuits, Practice Problems: 18, 20, 38, 40, and 41
15. Determine the potentiometer setting required to set the total circuit current in Figure 5.32a to 50
mA. I =
Vs
R1
=
ECT 122 Week 4 iLab #1
Parts:
Breadboard
DC power supply
Handheld DMM
Test leads
Wire
2.2k resistor
3.3k resistor
1. What is the relationship between conductance and resistance?
Resistance and current are related by Ohm's Law.
Voltage = Current x Resistan
ECT 122 Week 7 iLab #1
Name:_
Thevenins Theorem
1. What is Thevenins theorem? What purpose does it serve? Thevenins theorem states
that any resistive circuit or network, no matter how complex, can be represented as a
voltage source in series with a source
ECT 122 Week 2 iLab #1
Ohms Law
1. State Ohms Law. One part of Ohms law, is the greater the difference of potential
across a fixed resistance, the greater the resulting current. The other parts of Ohms law,
is that greater the resistance, the lower the cu
ECT 122 Week 3 iLab #1
Parts:
Breadboard
DC Power Supply
Hand Held DMM
Test leads
Wire
1.0k resistor
2.2k resistor
3.3k resistor
1. Identify the type of the following circuits as either serial or parallel.
2. List four characteristics of a series circuit.
ECT 122 Week 7 iLab #2
Name:_
Alternating Current
1. Define Alternating Current? Alternating current (ac) is bidirectional, meaning that the
flow of charge changes direction periodically.
2. Draw an X-Y axis display where each X division is 1 ms/div and e
ECT 122 Week 2 iLab #3
Part 1
Parts:
Breadboard
DC Power Supply
Hand Held DMM
Test leads
Wire
56k resistor
1. Given the circuit below, use Ohms law to determine the total current in the circuit and the
voltage across the resistor.
XMM1
V1
5V
R1
56k
IT _
V
1, 3, 8, 16, 23, 26, 30, 40, 46, 47, and 51
1.
Each of the following resistor combinations is connected as shown in Figure 4.29. For each combination,
calculate the total circuit resistance.
R1
R2
R3
R4
a. 1 k 220 330 1.1 k = 2.65k
b. 10 18 47 200 = 275
c