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Year 9 - Science

Making parallel circuits

Resistance and parallel circuits

Unit Summary

This unit covers electrical circuits, compares appliance power ratings, and understands domestic fuel use and costs. It explores electric current, potential difference, resistance, and the differences between conductors and insulators, focusing on calculations and applications in circuits.

Lesson Summary

You will learn to use circuit diagrams to build parallel circuits and draw circuit diagrams of parallel circuits.

Key Notes

  • A parallel circuit is a circuit with more than one complete loop, from one end of a battery to the other end.
  • A circuit is built systematically following a circuit diagram, round in one direction, starting from any point.
  • A parallel circuit is built systematically, completing each loop of the circuit in turn.
  • A circuit diagram is drawn systematically, following each loop round and completing each one in turn.
  • Wires in a circuit diagram are drawn with a ruler for clarity, with no tiny gaps that would break the circuit.

Vocabulary To Learn

  • series circuit: An electric circuit with one complete loop from one end of a cell or battery to the other end.
  • complete circuit: A circuit that has no gaps, allowing electricity to flow continuously around the circuit.
  • parallel circuit: An electric circuit with more than one complete loop from one end of a cell or battery to the other end.
  • circuit diagram: A simple and clear way of showing the setup and components in an electrical circuit.

Common Mistakes To Avoid

  • Components of a parallel circuit must match the exact layout of a circuit diagram.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

A parallel circuit is a circuit with more than one complete loop, from one end of a battery to the other end. A circuit is built systematically following a circuit diagram, round in one direction, starting from any point.

2. Define this scientific word and use it in context. 'series circuit'

An electric circuit with one complete loop from one end of a cell or battery to the other end. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Components of a parallel circuit must match the exact layout of a circuit diagram. Correction: Focus on pupils starting at one end of the battery and building each loop up in turn, focusing on putting the connections in the correct order.

More Lessons In This Unit

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