Electrical Theory – Alternating Current (AC), Basic Trigonometry and Resistance

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About Course

This course will cover the basic concepts of alternating current (AC), basic trigonometry, and resistance in electrical circuits. Students will learn about the characteristics of AC and how to calculate its frequency and voltage, the fundamentals of trigonometry, and how to apply it in AC circuits. They will also learn about the factors affecting resistance in electrical circuits and how to calculate resistance using Ohm’s law.

Course Objectives: Upon completion of this course, students will be able to:

  • Describe the characteristics of alternating current (AC)
  • Calculate the frequency and voltage of AC
  • Understand the basics of trigonometry and apply it in AC circuits
  • Describe the factors affecting resistance in electrical circuits
  • Calculate resistance using Ohm’s law

Course Outline:

I. Alternating Current (AC)

  • Introduction to AC
  • Characteristics of AC
  • Calculation of AC frequency and voltage
  • AC power and its measurement

II. Basic Trigonometry

  • Introduction to trigonometry
  • Trigonometric functions (sine, cosine, tangent)
  • Calculation of phase angles in AC circuits

III. Resistance in Electrical Circuits

  • Factors affecting resistance (material, temperature, length, cross-sectional area)
  • Ohm’s law and its application in calculating resistance
  • Series and parallel circuits and their effects on resistance

IV. AC Circuit Analysis

  • AC circuit analysis using phasor diagrams
  • Impedance in AC circuits (resistance, inductance, and capacitance)
  • Calculation of current and voltage in AC circuits

V. AC Power

  • Power factor and its importance in AC circuits
  • Calculation of power in AC circuits
  • Reactive power and its effect on power factor

Assessment:

  • Quizzes on the fundamentals of AC, trigonometry, and resistance
  • Practical assignments involving the calculation of AC frequency, voltage, and power
  • Final exam covering the concepts covered in the course

Conclusion: This course provides students with a foundational understanding of alternating current (AC), basic trigonometry, and resistance in electrical circuits. By the end of the course, students will be able to calculate the frequency and voltage of AC, apply basic trigonometry in AC circuits, and calculate resistance using Ohm’s law. They will also be able to analyze AC circuits using phasor diagrams and understand the factors affecting AC power.

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What Will You Learn?

  • This course provides students with a foundational understanding of alternating current (AC), basic trigonometry, and resistance in electrical circuits. By the end of the course, students will be able to calculate the frequency and voltage of AC, apply basic trigonometry in AC circuits, and calculate resistance using Ohm's law. They will also be able to analyze AC circuits using phasor diagrams and understand the factors affecting AC power.

Course Content

Alternating Current (AC)
Advantages of (AC) - AC Waveforms - Sine Wave Values - Resistive Loads - Power in an AC Circuit - Skin Affects in AC circuits

Basic Trigonometry and Vectors
- Right Triangles - The Pythagorean Theorem - Sines - Cosigns - Tangents - Formulas - Practical Application

Inductance in AC Circuits
Inductance - Inductive Reactance - Schematic Symbols - Inductors Connected In Series - Inductors Connected In Parallel Circuits - Voltage & Current Relationships in an Inductive Circuit - Power in an Inductive Circuit - Reactive power - Q of an Inductor

Resistive-Inductive Series Circuits
R-L Series Circuits - Impedance - Total Current - Total Current - Voltage Drop across the Resistor - Watts - Computing the Inductance - Total Voltage - Computing the Reactive Power- Computing the Apparent Power - Power Factor - Angle Theta

Resistive-Inductive Parallel Circuits
Resistive-Inductance Parallel Circuits - Computing Circuit Values

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