Measuring electric current
I can measure current and describe the rule for current in a series circuit.
Measuring electric current
I can measure current and describe the rule for current in a series circuit.
Lesson details
Key learning 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.
- 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.
Common misconception
Pupils hold a consumption model of electric current in which it is used up in a circuit. They misuse the terms: voltage, current and electricity and choose a voltmeter to measure current.
Get pupils to investigate the size of current through a range of different conductors (and insulators) with an ammeter in a simple circuit. This will help them familiarise themselves with it and its use.
Keywords
Ammeter - An ammeter is a device that measures the current flowing in a circuit.
Amp - An ammeter measures the current in units called amps (A) which is short for amperes.
Series circuit - An ammeter is always placed in a series circuit so the electric current has to pass through it.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
a tiny negatively charged particle
this can be either negative or positive
a component that pushes out and pulls in electrons
Exit quiz
6 Questions
