Section 3 Basic Electricity and Magnetism Unit 12 Basic Electricity and Magnetism.
Electricity and magnetism are different aspects of a single force: electromagnetism Electricity =...
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Transcript of Electricity and magnetism are different aspects of a single force: electromagnetism Electricity =...
![Page 1: Electricity and magnetism are different aspects of a single force: electromagnetism Electricity = result of charged particles Magnetism = result.](https://reader036.fdocuments.in/reader036/viewer/2022082817/56649db95503460f94aa8f0c/html5/thumbnails/1.jpg)
Electromagnetism and Generating Electricity
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Electricity and Magnetism Electricity and
magnetism are different aspects of a single force: electromagnetism Electricity = result
of charged particles Magnetism = result
of moving electrons in an atom
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Electricity and Magnetism Moving electric
charge creates a magnetic field. Magnetic field
lines form circles around wire
Right hand rule
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Electricity and Magnetism Solenoid – a coil of wire with an electric
current (produces magnetic field). By putting a solenoid around an magnetic
metal, you create an electromagnet.
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Solenoid makes an electromagnet
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Electricity and Magnetism Strength of electromagnet depends on
1. Current 2. Number of loops3. Type of core
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Electromagnetic Devices
Many devices use electromagnets: 1. Galvanometer – device that detects
and measures electric current2. Electric motor – uses an
electromagnet to turn an axle.3. Loudspeaker – uses changing
current to move a magnet back and force to produce sound waves
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Electric Motor
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Generating Electricity
Moving a magnet into and out of a coil of wire causes charges in a wire to move. Electromagnetic induction – process of
creating a current by changing a magnetic field
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Generating Electricity
Moving a magnet into and out of a coil of wire causes charges in a wire to move. Became Faraday’s Law Obeys conservation of energy
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Generating Electricity
Generators are the opposite of motors: convert mechanical energy into electrical energy. Have wire loops that are rotated
between two magnets Can be either AC or DC
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Generating Electricity
Transformer – device that increases or decreases the voltage of AC. Consists of two coils of wire wrapped
around opposite sides of a closed iron loop
One side has more loops More loops = greater voltage Used to transfer electricity (power plant
to homes)
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Transformer
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Electromagnetism Foldable Fold the paper as instructed Label each section as follows: For each section, draw the correct
figure from the book, including labels and the caption.GalvanometerElectric motor Loudspeaker
Generator Step-Up Transformer
Step-DownTransformer
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Electromagnetism FoldableGalvanometer: Fig 5 on p. 630 (Fig 10 p.
638)Electric motor: Fig 6 on p. 631 (Fig 11 p.
639)Loudspeaker: Speaker pic on p. 635
(none)Generator: Fig 3 on p. 634 (Fig 14 p. 643)Step-Up Transformer: Fig 7A on p. 638
(Fig 16B p. 645)Step-Down Transformer: Fig 7B on p.
638 (Fig 16A p. 645)