Course Content
Safety
S-1 General Safety Rules S-2 Effects of Electric Current S-3 On The Job S-4 Protective Clothing S-5 Ladders & Scaffolds S-6 Fires S-7 Ground Fault Circuit Interrupters S-8 Grounding
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Unit 1 – Atomic Structure
Objectives After studying this unit, you should be able to: List the principal parts of an atom State the law of charges Discuss the centripetal force  Discuses the differences between conductors & insulators Preview Electricity is the driving force that provides most of the power for the industrialized world. It is used to light houses, cook meals, heat and cool building, run electric motors, & supplies ignition for most automobiles in the world, 
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Electrical Theory Fundamentals
About Lesson

Welcome to the lesson on series circuits! A series circuit is a basic and fundamental type of electrical circuit configuration. Understanding series circuits is essential as they form the building blocks for more complex circuits. In this lesson, we will explore the characteristics, calculations, and behavior of series circuits. Let’s dive in!

  1. Definition and Characteristics: A. Definition:

    • Define a series circuit as a circuit arrangement where components are connected end-to-end, forming a single path for current flow.
    • Emphasize that the same current passes through each component.

    B. Characteristics:

    • Discuss the key characteristics of series circuits, such as:
      • The total resistance is equal to the sum of individual resistances.
      • The total voltage across the circuit is divided among the components.
      • The same current flows through each component.
  2. Calculating Total Resistance: A. Resistors in Series:

    • Explain how to calculate the total resistance when resistors are connected in series.
    • Discuss the formula: Total Resistance = R1 + R2 + R3 + … + Rn.

    B. Example Calculation:

    • Provide an example series circuit with multiple resistors and guide students through the calculation of total resistance.
    • Include practice exercises for students to reinforce the concept.
  3. Calculating Total Voltage: A. Voltage Division Rule:

    • Explain the voltage division rule in series circuits.
    • Discuss how the total voltage across the circuit is divided among the components based on their individual resistances.

    B. Example Calculation:

    • Provide an example series circuit with multiple resistors and guide students through the calculation of voltage across each resistor.
    • Emphasize that the sum of individual voltages should equal the total voltage of the circuit.
  4. Current in Series Circuits: A. Constant Current Flow:

    • Explain that in a series circuit, the same current flows through each component.
    • Emphasize that the total current in the circuit is equal to the current passing through each resistor.

    B. Example Calculation:

    • Provide an example series circuit with multiple resistors and guide students through the calculation of current using Ohm’s Law (I = V/R).
  5. Practical Applications and Considerations: A. Christmas Lights:

    • Discuss how series circuits are used in Christmas lights, where bulbs are connected in series.
    • Explain that if one bulb burns out, the entire string may stop working due to the interruption in the circuit.

    B. Fuses and Circuit Breakers:

    • Discuss how series circuits are utilized in electrical protection devices such as fuses and circuit breakers.
    • Explain their function in breaking the circuit in case of overcurrent.
  6. Advantages and Disadvantages of Series Circuits: A. Advantages:

    • Discuss the advantages of series circuits, such as simplicity, easy calculation of total resistance, and uniform current flow.

    B. Disadvantages:

    • Highlight the disadvantages of series circuits, such as the failure of one component leading to the failure of the entire circuit.

Conclusion: Congratulations! You have learned the fundamentals of series circuits. You now understand their characteristics, how to calculate total resistance and voltage, and the behavior of current in series circuits. Remember that series circuits provide a fundamental understanding of circuit analysis and serve as a basis for more complex circuit configurations. Continue practicing and applying these concepts to further your knowledge of electrical circuits.

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