Motors, Generators and Transformers

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Flashcards on Motors, Generators and Transformers, created by liv.hansen99xx on 29/04/2016.
liv.hansen99xx
Flashcards by liv.hansen99xx, updated more than 1 year ago
liv.hansen99xx
Created by liv.hansen99xx about 9 years ago
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Question Answer
5.1 The Motor effect Electromagnets, Generators and Transformers
Like Poles... Unlike Poles... Repel Attract
uniform magnetic field when the lines are parallel the field is uniform.
where, on like and unlike magnet patterns, is the magnetic field uniform. On like magnets the field is uniform in the centre of the gap. On unlike magnets the field is uniform going away from the magnet ends pointing towards eachother.
how is a magnetic field produced around a wire? when a current flows through the wire.
apperance of field around a wire concentric circles, oerpendicular to the wire.
how do you reverse the direction of the magnetic field? reversing current reverses the direction of the magnetic field
Left hand rule
How do you make an electromagnet by wrapping insulated wire around an iron core. When a current flows through the coil, the iron becomes magnetised
Uses of electromagnets scrapyard cranes, circuit breakers and electric bells.
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