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magnetism

and electromagnetism

QuestionAnswer
Like magnetic poles Repel each other.
Unlike magnetic poles Attract each other.
What is created when a group of dipoles are aligned? A magnetic domain.
What is the SI unit of magnetic field strength? Tesla.
Is there a smallest unit of magnetism? False.
How are magnets classified? According to their magnetic properties.
What is the property called when electrons rotate on their axis? Electron spin.
Name 3 principal types of magnets. Natural magnets, electromagnets, and permanent magnets.
What are the physical laws of magnetism? They include the conservation of magnetism and require that there be a south pole for every north pole.
What type of material can be made magnetic when placed in an external magnetic field? Ferromagnetic material.
What type of material is water in terms of magnetism? Diamagnetic.
What are the 4 classifications of magnetism? Diamagnetic, paramagnetic, ferromagnetic, and nonmagnetic.
What is a lodestone? A natural magnet.
Where is the Earth's magnetic field strongest? At the poles.
What does a charged particle in motion create? A magnetic field.
What is the force between magnetic poles proportional to? The product of the strengths of the poles divided by the square of the distance between them.
What is an electromagnet? A coil of wire wound around an iron core that produces a magnetic field with an electric current.
What does electromagnetic induction refer to? The production of an electric current due to a changing magnetic field.
What is electromotive force (EMF)? The electrical force expressed in volts.
Name the 3 types of transformers. Shell type, closed core, and autotransformer.
What are electromechanical devices? Devices such as generators and motors.
What device measures electron flow in a conductor? An ammeter.
What is thermionic emission? Electron emission from a heated source.
What is the difference between self-induction and mutual induction? Mutual induction requires two coils, while self-induction requires only one.
Created by: user-2019507
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