Year 8 - Science
Measuring electric current
Series circuits
Study Hub
Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers electric current, potential difference, and resistance in series and parallel circuits. It also explores charge separation, electron transfer, and electric fields. The unit focuses on interpreting data, identifying patterns, and drawing conclusions using scientific knowledge.
Lesson Summary
You will learn to measure current and describe the rule for current in a series circuit.
Key Notes
- An ammeter is used to measure the size of an electric current.
- An ammeter measures the current flowing through it without affecting the current in the circuit it is connected into.
- Electric current is measured in amps (A), which is short for amperes.
- The current in a series circuit is the same everywhere.
- Adding a component to a series circuit changes the current everywhere, on both sides of the component.
Vocabulary To Learn
- ammeter: An ammeter is a device that measures the current flowing in a circuit.
- amps (A): An ammeter measures the current in units called amps (A) which is short for amperes.
- series circuit: A series circuit is an electric circuit with one complete loop from one end of a battery to the other end.
Common Mistakes To Avoid
- Pupils often hold a consumption model of electric current, believing it is used up in a circuit. They misuse the terms voltage, current and electricity, and may choose a voltmeter to measure current.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
An ammeter is used to measure the size of an electric current. An ammeter measures the current flowing through it without affecting the current in the circuit it is connected into.
2. Define this scientific word and use it in context. 'ammeter'
An ammeter is a device that measures the current flowing in a circuit. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils often hold a consumption model of electric current, believing it is used up in a circuit. They misuse the terms voltage, current and electricity, and may choose a voltmeter to measure current. Correction: Encourage pupils to investigate the size of the current through a range of different conductors (and insulators) using an ammeter in a simple circuit. This will help them become familiar with the ammeter and its correct use.
More Lessons In This Unit
Browse all guides in the Year 8 Science guide library.