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Basics in Magnetism Electromagnetism Force on a Current-Carrying Wire EM Induction Transformer Generators Electric Motors ELECTROMAGNETISM
What happens when you move a magnet into a coil of wire? Michael Faraday EM Induction Changing magnetic field can produce electricity!
How is a changing magnetic field produced? Using AC source Moving magnet in a coil of wire Moving wire in a magnetic field
What factors affect the emf produced? The number of loops The speed of the magnet The size of the coil of wire More turns, greater emf Faster, greater emf Greater size, greater emf
What factors affect the emf produced? The polarity of magnet Direction of motion Strength of Magnet Changes direction Greater strength, greater emf
The AC Generator Top view Allows contact with the rings while allowing them to slip past Prevents the wires from twisting
The AC Generator
Causes changing magnetic field Makes the field stronger Emf is induced in the coils
The Transformer V s > V p Step down transformer V s < V p Charging electronic gadgets Step up transformer Power transmission
Power Transmission There is less current at high voltage. Power loss is lower at high voltage.
Applications of Electromagnetism
-Generators -Motors -Eddy Currents -Maxwell’s Four Equations AP Physics C Mrs. Coyle.
Basics in Magnetism Electromagnetism Force on a Current-Carrying Wire EM Induction Transformer Generators Electric Motors ELECTROMAGNETISM.
Motion Current: Generating Electricity (Faraday’s law)
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Grade 10 Multiple Choice Questions Click here to start the presentation Click here to start the presentation.
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ELECTROMAGNETISM. ELECTROMAGNETISM ????? ELECTROMAGNETISM THE BRANCH OF PHYSICS THAT DEALS WITH THE RELATIONSHIP BETWEEN ELECTRICITY & MAGNETISM.
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