Bellwork What is a transformer? What is a transformer? A device for increasing or decreasing voltage...
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Transcript of Bellwork What is a transformer? What is a transformer? A device for increasing or decreasing voltage...
![Page 1: Bellwork What is a transformer? What is a transformer? A device for increasing or decreasing voltage through electromagnetic induction A device for increasing.](https://reader036.fdocuments.in/reader036/viewer/2022062500/5697bfc31a28abf838ca5324/html5/thumbnails/1.jpg)
BellworkBellwork
What is a transformer?What is a transformer? A device for increasing or A device for increasing or
decreasing voltage through decreasing voltage through electromagnetic inductionelectromagnetic induction
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The Electromagnetic The Electromagnetic SpectrumSpectrum
4/11/144/11/14
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AC Generator
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Alternating Current and Alternating Current and GeneratorsGenerators
The rotation of the wire cycles The rotation of the wire cycles through a changing magnetic through a changing magnetic fieldfield
AC is easier to transform voltage AC is easier to transform voltage and current and current
Can be transmitted over long Can be transmitted over long distancesdistances
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Magnetic Field
Magnetic field strength is dependent on the inverse square law
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Inverse Square Law:
http://hyperphysics.phy-astr.gsu.edu/hbase/forces/isq.html#isq
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Inverse Square Law: (recap)
Gravitational Force Electric Field Electric Force EM Waves (Radiation) Light Sound Magnetic Field Strength (NEW)
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Electromagnetic Wave and Spectrum
Electromagnetic Waves: a wave that consists of oscillating electric and magnetic fields
Electromagnetic Spectrum: electromagnetic waves that range in wavelength and frequency
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Electromagnetism Abb.
EM or E&M = Anything Electromagnetic
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E&M WavesE&M Waves
Travel at the speed of lightTravel at the speed of light Are transverse wavesAre transverse waves Are produced by accelerating Are produced by accelerating
chargescharges Can propagate without a mediumCan propagate without a medium Transfer energyTransfer energy Have perpendicular electric and Have perpendicular electric and
magnetic fields to propagationmagnetic fields to propagation
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Electromagnetic WavesElectromagnetic Waves
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Electromagnetic WavesElectromagnetic Waves
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Electromagnetic SpectrumElectromagnetic Spectrum
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The Electromagnetic Spectrum
Radio Waves Microwaves Infrared Visible Light Ultraviolet X-Rays Gamma Rays
Long wavelengths / Low frequencies
Short wavelengths / High frequencies
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The Electromagnetic Spectrum
Radio Waves - communications, TV, communications, TV, radio stationsradio stations
Microwaves – Radar, cell phones, heating food
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The Electromagnetic Spectrum
Infrared - heat, heat, photography, night vision photography, night vision gogglesgoggles
Visible Light – Human eye sight
Ultraviolet – Sunburn, purifying water
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The Electromagnetic Spectrum
X-Rays - medicine, medicine, astronomy, security astronomy, security screeningscreening
Gamma Rays - cancer cancer treatment, astronomytreatment, astronomy