Introduction to Circuits

Provided by: ToolingU

“Introduction to Circuits” provides a foundational overview of electrical circuitry. Whether wired in series, parallel, or a combination of the two, all circuits consist of a source, path, control, and load. Each of these components serves a purpose, and many circuits have extra components to prevent safety hazards and damage. Visual representations of circuits, such as schematic diagrams, use symbols of these components to illustrate the circuit’s layout. This method makes it easier to understand circuits and the rules that describe how they function, such as Kirchhoff’s Laws. Understanding how circuits work is essential when working with electricity. This includes being familiar with circuit components, circuit diagrams, and the rules that govern circuits, which serves as the basis for understanding advanced electrical topics. Without the foundational information presented in this class, users would not be prepared to study more complex aspects of electrical systems.

Course Objectives:

  • Define circuit
  • Identify the components of a circuit
  • Describe the purpose of symbols and abbreviations in schematic diagrams
  • Describe the source in a circuit
  • Describe the path in a circuit
  • Describe resistance in a circuit
  • Describe the control in a circuit
  • Describe the load in a circuit
  • Describe the purpose of common protective devices
  • Describe grounding
  • Describe a chassis ground
  • Describe overcurrent devices
  • Describe Kirchhoff’s Laws
  • Describe series circuits
  • Describe parallel circuits
  • Describe combination circuits.

Recommended Background

  • Recommended for mechanical/electrical/plumbing maintenance technicians.

Course ID







Communication, Critical Thinking, Personal Effectiveness, Electricity, Electronic Sensors, Safety Practices

Method of Delivery


Estimated Effort

2.5 hrs



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