Basic Electrical Concepts (Junior Cert Applied Technology): Revision Notes

Basic Electrical Concepts

• Basic Electrical Concepts encompass principles essential in Applied Technology.
• Understanding these concepts is important for applications involving energy and control systems.

Definitions

• Potential Difference (Voltage):
  • The difference in electric potential between two points, measured in volts. It propels the flow of electric current in a circuit.
• Current:
  • The rate of flow of electric charge through a conductor, measured in amperes (A).

• Resistance:
  • Opposition to the flow of electric current in a material. This is essential for determining how much current flows for a given voltage.
  • Measured in ohms ($\Omega$).

• Power:
  • The rate at which electrical energy is used. It indicates the electrical work done per unit time, measured in watts (W).