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Magnetism & Electromagnetism

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Magnetism and Electromagnetism spec AC.docx

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4 pages of great notes

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slm_Magnet and electromagnet revision sheets.pdf

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Explains Flemings Left Hand Rule

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A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves. This is called the motor effect.

This size of the force is greatest when the wire is perpendicular to the magnetic field of the permanent magnet. In other words, it cuts through the magnetic field at 90°. If the wire is parallel to the magnetic field, it will not experience any force.

Working out the direction of the force

The direction of the force - and therefore the movement of the wire - can be determined using Fleming's left hand rule.

To do this, spread out your left thumb, forefinger (index finger) and second finger so they are all at 90° to one another:

Your thumb will point in the direction of movement.

Remember:

Note that the direction of the force is reversed if either the direction of the current is reversed, or if the direction of the magnetic field is reversed.

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A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves. This is called the motor effect.

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The motor effect

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GCSE Science (1-9): Physics: Motor effect and F= BIL

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Electromagnetic Induction

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GCSE Science (1-9): Physics: Electromagnetic induction

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Flemings Left Hand Rule

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GCSE Science: Physics: Fleming's left hand rule and the motor effect

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Physics, magnets and poles

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GCSE Science (1-9): Physics: Magnets, fields and induced magnetism

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Magnets & Electromagnets Flashcards | Quizlet

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Start studying Magnets & Electromagnets. Learn vocabulary, terms, and more with flashcards, games, and other study tools.