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Introduction to Alternating Current and Transformers

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CONCEPTS OF ALTERNATING CURRENT

Voltage Waveform
Magnetic Field of a Coil
Basic AC Generation
Frequency
Alternating Current Values
Effective Value of a Sine Wave
Sine Waves in Phase
Ohm's law in AC Circuits
Summary
Answers


INDUCTANCE

Self-Inductance
Inductance
Unit of Inductance
L/R Time Constant
Power Loss in an Inductor
Series Inductors without Magnetic Coupling
Summary
Answers


CAPACITANCE

The Farad
Charging and Discharging a Capacitor
Charge and discharge of an RC Series Circuit
RC Time Constant
Capacitors in series and parallel
Fixed Capacitor
Color codes for Capacitors
Summary
Answers


Inductive and Capacitive Reactance

Inductive Reactance
Capacitors and Alternating Current
Capacitive Reactance
Reactance, Impedance, and Power Relationships in AC Circuits
Impedance
Ohm's Law for AC
Power in AC Circuits
Calculating Reactive Power in AC Circuits
Calculating Apparent Power in AC Circuits
Power Factor
Power Factor Correction
Series RLC Circuits
Inductive and Capacitive Reactance Summary
Inductive and Capacitive Reactance Answers


Transformers

Basic Operation of a Transformer
Hollow-Core Transformers
Transformer Windings
Schematic Symbols for Transformers
Producing a Counter EMF
Coefficient of a coupling
Effect of a load
Power Relationships between primary and secondary windings
Transformer Ratings
Safety Effects of Current on the body
Transformers Summary
Transformers Answers


Useful AC Formulas

 




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