Source: Extra Practice

Define an electric circuit. Name and describe the function of any three essential components required to make a simple electric circuit.

Model Answer

An electric circuit is a complete and continuous path that allows electric current to flow from the positive terminal of a cell/battery, through various components, and back to its negative terminal. A break in this path stops the current. Three essential components:

  1. Electric Cell: The source of electricity, providing the energy for charges to move.
  2. Connecting Wires: Conductors (e.g., copper) that form the pathway for current flow between components.
  3. Electric Bulb (Load): Utilizes electrical energy, converting it (e.g., to light) and indicating current presence.

Explanation

Grading Rubric:

  • Correct definition of an electric circuit (1 mark).
  • Naming three essential components (0.5 mark each = 1.5 marks).
  • Describing the correct function of each of the three named components (0.5 mark each = 1.5 marks).