CKT02 Voltage Current and Resistance
Transcript of CKT02 Voltage Current and Resistance
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Electric Circuit1
241-205
Computer Engineering Circuits
Voltage Current and Resistance
DK
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Electric Circuit2
Chapter 2
Voltage Current and Resistance
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Electric Circuit3
OUTLINE
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Electric Circuit4
Atomic Structure
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Electric Circuit5
Atomic Structure
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Electric Circuit6
Atomic Structure
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Electric Circuit7
Atomic Structure
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Electric Circuit8
Atomic Structure
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Electric Circuit9
Atomic Structure
•> 29 Electrons
•> Orbit the nucleus in four shells
•> 1 valence electron
The valence Electrons of copper are not bound to the given atom butfree to move. Free electrons make copper an excellent conductor .
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Electric Circuit10
Categories of Materials
Conductors
One to three valence electrons : Silver, Copper …
Semiconductors
Four valence electrons : Silicon and germanium.
Insulators
More than four valence electrons.
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Electric Circuit11
Electrical ChargeElectrical charge (Q) : an electrical property of matter that
exists because of an excess or deficiency of electrons.
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Electric Circuit12
Electrical Charge
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Electric Circuit13
Electrical Charge
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Electric Circuit14
Electrical Charge
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Electric Circuit15
Positive and Negative Charge
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Electric Circuit16
Voltage, Current and Resistance
Voltage
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Electric Circuit17
Current
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Electric Circuit18
Current
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Electric Circuit19
Current
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Electric Circuit20
Resistance
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Electric Circuit21
Conductance
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Electric Circuit22
Voltage And Current Source
Voltage Source Ideal Voltage Source
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Electric Circuit23
Voltage Source
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Electric Circuit24
Voltage Source
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Electric Circuit25
Voltage Source
Electronics Power Supply
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Electric Circuit26
Current Source
Ideal Current Source
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Electric Circuit27
Resistor
Fixed Resistors
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Electric Circuit28
Resistor
Cutaway view of Resistors
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Electric Circuit29
Resistor
Resistor Color Code
A B C D
Value of Resistor = AB x 10C±D% Ohm
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Electric Circuit30
Resistor
Resistor Color Code
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Electric Circuit31
Resistor Color Code
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Electric Circuit32
Resistor
Five-band Color CodeFor precision resistors with tolerances of 1%, 2% or less
A B C D E
Value of Resistor = ABC x 10D±E% Ohm
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Electric Circuit33
Five-band Color Code
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Electric Circuit34
Resistor Label Code
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Electric Circuit35
Variable Resistor
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Electric Circuit36
Variable Resistor
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Electric Circuit37
Variable Resistor
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Electric Circuit38
Th El t i Ci it
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Electric Circuit 39
The Electric Circuit
Basic Circuit
B i Ci it
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Electric Circuit 40
Basic Circuit
Ci it C t C t l
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Electric Circuit 41
Circuit Current Control
Ci it C t C t l
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Electric Circuit 42
Circuit Current Control
Circuit Current Control
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Electric Circuit 43
Circuit Current Control
Switch Type
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Electric Circuit 44
Switch Type
Several Varieties of Mechanical Switches
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Electric Circuit 45
Several Varieties of Mechanical Switches
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Electric Circuit 46
Semiconductor Switches
Protective Devices
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Electric Circuit 47
Protective Devices
Wires
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Electric Circuit 48
Wires
• AWG : American Wire Gauge
• Cross-sectional area : Circular mil (CM) , one circular mil is the area
of a wire with a diameter of 0.001 inch or 1/1000 Inch (1 mil)
Wires
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Electric Circuit 49
Wires Resistance
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Electric Circuit 50
Wires Resistance
Wires Resistance
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Electric Circuit 51
Wires Resistance
Ground
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Electric Circuit 52
Ground
Example of using grounds in a circuit application
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Electric Circuit 53
Example of using grounds in a circuit application
Ground
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Electric Circuit 54
Ground
Basic Circuit measurements
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Electric Circuit 55
Basic Circuit measurements
Measuring Current
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Electric Circuit 56
g
Measuring Voltage
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Electric Circuit 57
g g
Measuring Resistance
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Electric Circuit 58
g
Summary
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Electric Circuit 59
y
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Electric Circuit 60