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Lecture 6:
Midterm 1 Review
ENG17 : Circuits I
Spring 2015
April 16, 2015
1
Units
2
Voltage and Current
Current
Voltage
Charge
3
Power and Energy
Power
2
𝑉
= 𝐼2 𝑅 =
𝑅
Conservation of
Energy
Energy
4
Sources
Combining
Sources
5
Ohms Law
Resistance
Short
Circuit
Open
Circuit
Conductance
6
Kirchoff’s Laws
Current
Law
Voltage
Law
7
Series / Parallel Resistors
Series
Parallel
8
Voltage & Current Divider
9
Example: Equivalent Resistance
10
Example: Voltage Divider
• Wheatstone Bridge
– 2 voltage dividers in parallel
11
Example: Current Divider
12
Example: Node-Voltage
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Example: Mesh Current Analysis
14
Example: Source Transformation
15
Example: Find Norton Equivalent
Using Source Transformations
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Example: Equivalent Circuit
Find RN and IN
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Example – Max Pwr Transfer
Find the value of RL for maximum
power transfer. Find the maximum
power.
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Example: Superposition
Use superposition to
find vo.
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Example: Superposition w/Dependent
Sources
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