Physics GCSE
relays and electromagnetic switches
What relays and electromagnetic switches means in Physics GCSE, as defined for AQA.
Definition of relays and electromagnetic switches
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Reference: AQA
Devices in which closing the switch drives a current through the electromagnet, and the moving arm does something mechanical, letting a small current switch a very large one.
Topics that use relays and electromagnetic switches
- Electromagnetism (AQA GCSE)
Related terms
- adding fields of turns
- armature and contacts
- circular field around a wire
- distance from the wire
- electromagnet
- field inside a solenoid
- field pattern of a solenoid
- field pattern of a straight wire
Using relays and electromagnetic switches in the exam
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