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Review & Practice for Basic Electricity, By C-C Tsai
June 2016
Contents
 Determine the total inductance LT for Inductors in Series and parallel.
 Determine the self-induced voltage VL for an Inductor entered into a varying current.
 Explain how to generate a power for storing energy into battery.
 Determine the total capacitance CT for Capacitors in Series and parallel.
 Determine the distributed voltage VC for Capacitors in Series and parallel.
 Determine the voltage VC for Capacitors charging and discharging.
 Determine the voltage or current for a circuit containing R, C, and L in DC steady state.
 Determine the voltage or current for a resitive circuit containing at least one color-code resistor.
 Determine the limited resistance Rs for turning on multiple LEDs in series and parallel.
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Determine the voltage Va using Millman’s theorem for a resistive circuit.
Determine the loading resistance RL using Maximum power transfer for a resistive circuit.
Determine the voltage or current for a resistive circuit using Source conversion.
Determine the voltage or current for a resistive circuit using Nodal analysis.
Determine the voltage or current for a resistive circuit using Superposition theorem.
Determine the voltage or current for a Bridge network.
Determine the voltage or current for a resistive circuit using Thevenin’s theorem.
Determine the voltage or current for a resistive circuit using Delta-Wye conversion.
 Determine the total inductance LT for Inductors in Series and parallel.
Given L1=1mH, L2=4.4mH, L3=3mH, L4=1.6mH, L5=8mH, and L6=2mH, determine the total inductance LT.
L1
LT
L2
L3
L4
L5
L6
 Determine the induced voltage VL for an Inductor entered into a varying current.
Determine VL if L= 0.75H with a varying current i.
 Explain how to generate a power for storing in battery in your motorcycle.
Faraday’s Law: Voltage is induced in a circuit whenever the flux linking the circuit is changing
Lenz’s Law: Polarity of the induced voltage opposes the cause producing it
 Determine the total capacitance CT for Capacitors in Series and parallel.
Given C1=2F, C2=8F, C3=0.6F, and C4=1.8F, find the total capacitance CT.
C2
18V
C3
C4
C1
 Determine the distributed voltage VC for Capacitors in Series and parallel.
Given C1=2F, C2=8F, C3=0.6F, and C4=1.8F, find the voltage VC3 and the energy of C4.
C2
18V
C3
C4
C1
 Determine the voltage VC for the circuit of Capacitors charging and discharging.
Given R=2k and C=100F and an input Vin, plot the waveform of the voltage VC and mark the voltages at
t=0.4s, 1.0s, 1.6s, and 2.0s.
10V
Vin
R
Vin
C
VC
0
0.4
1.0
1.6
2.0
t(s)
Given R=10K and C=47F, and if Vc3.16V can start the alarm, how long the input voltage will be started up
to 5V.
 Determine the voltage or current for a circuit containing R, C, and L in DC steady state.
Given E=24V, R1=3k, R2=6k, R3=2k, and R4=4k, determine VC1 if the circuit is DC steady state.
R1
E
R3
R2
C1
R4
Given E=12V, R1=1.6k, R2=4k, R3=6k, R4=3k, and L1=0.5H, determine IR1 if the circuit is DC steady state.
R1
E
R3
R2
C1
L1
R4
 Determine the resistance R for a color-code resistor.
Given RS=0.25k, R1=2k, and R2=orange-black-red-gold, determine VR2.
RS
R1
R2
E=24V
Given RS=0.5k, R1=2k, R2=4k, and R3=yellow- black-red-gold, determine IR3.
RS
R1
R2
R3
E=24V
 Determine the limited resistance Rs for turning on LEDs in series or parallel.
A normal-on LED has the forward voltage 1.5V and forward current 10mA, find the proper resistance RS and
RS2 such that their circuits can drive these LEDs.
RS2
Rs
E=24V
V1
12 V
 Determine the voltage Va using Millman’s theorem for a resistive circuit.
Given R1=3k, R2=6k, R3=12k, and RL=2k, find VRL using Millman’s theory.
R1
R2
R3
12V
18V
24V
RL
Given R1=3k, R2=6k, R3=12k, and RL=2k, find VRL using Millman’s theory.
R1
R2
R3
18V
12V
36V
RL
 Determine the loading resistance R using Maximum power transfer for a resistive circuit.
Given R1=4k, R2=12k, R3=2k, R4=6k, and R5 =1.5k, determine RL such that can get maximum power
transfer.
R1
R3
R5
R2
R4
8V
RL
12V
4mA
Given R1=4k, R2=16k, R3=2k, R4=6k, and R5 =1.5k, determine RL such that can get maximum power
transfer.
R1
R3
R2
R5
R4
RL
8V
12V
4mA
 Determine the voltage or current using Source conversion for a resistive circuit.
Given R1=1k, R2=2k, R3=4k, and RL=3k, determine IRL using source conversion.
R1
R3
R2
E=8V
I=4mA
IRL
RL
 Determine the voltage or current using Nodal analysis for a resistive circuit.
Given R1=1k, R2=2k, R3=4k, and RL=3k, determine IRL using Nodal analysis.
R1
R3
R2
E=8V
I=4mA
IRL
RL
Determine VR2 using Nodal analysis.
R3
6Ω
I2
I1
3A

R1
10Ω
2A
R2
4Ω
Determine the voltage or current using Superposition theorem for a resistive circuit.
Given R1=1k, R2=2k, R3=4k, and RL=3k, determine IRL using Superposition theorem.
R1
R3
R2
E=8V
I=4mA
IRL
RL
 Determine the voltage or current for a Bridge network.
Given R1=4k, R2=5k, R3=8k, and RL=0.5k, determine R4 such that the current IRL is zero.
R1
R2
RL
E=36V
IRL
R3
R4
 Determine the voltage or current using Thevenin’s theorem for a resistive circuit.
Given R1=3k, R2=5k, R3=7k, R4=5k, and RL=0.4k, determine the current IRL.
R1
R2
RL
E=24V
IRL
R3

R4
Determine the voltage or current using Delta-Wye conversion for a resistive circuit.
Determine the voltage Vo using  and Y conversion.
30Ω
Vo
10Ω
I1
1A
30Ω
10Ω
10Ω
30Ω
V1
10 V