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Questions and Answers
What are the substances that can become magnetized?
What are the substances that can become magnetized?
- Copper, lead, gold
- Silver, zinc, aluminum
- Platinum, titanium, mercury
- Iron, nickel, cobalt (correct)
A monopole is a theoretical magnetic object that has only one pole, either north or south.
A monopole is a theoretical magnetic object that has only one pole, either north or south.
True (A)
Who discovered the relationship between electric current and magnetism?
Who discovered the relationship between electric current and magnetism?
Hans Christian Oersted
The force resulting from magnets acting on each other is known as the __________ force.
The force resulting from magnets acting on each other is known as the __________ force.
What happens to the magnetic properties of a ferromagnetic material when removed from a magnetic field?
What happens to the magnetic properties of a ferromagnetic material when removed from a magnetic field?
Match the following terms with their definitions:
Match the following terms with their definitions:
An aimant permanent has low remanence magnetic.
An aimant permanent has low remanence magnetic.
The north pole of a magnet points towards the __________ magnetic pole of the Earth.
The north pole of a magnet points towards the __________ magnetic pole of the Earth.
What is the purpose of the right-hand rule in the context of magnetic fields?
What is the purpose of the right-hand rule in the context of magnetic fields?
An electro magnet cannot be turned off once it is activated.
An electro magnet cannot be turned off once it is activated.
What is a solenoid?
What is a solenoid?
Increasing the _______ can enhance the strength of an electromagnet.
Increasing the _______ can enhance the strength of an electromagnet.
Which of the following differences applies to solenoids compared to permanent magnets?
Which of the following differences applies to solenoids compared to permanent magnets?
Match the methods of generating a current through electromagnetic induction with their descriptions:
Match the methods of generating a current through electromagnetic induction with their descriptions:
Hans Christian Oersted discovered the principle of electromagnetic induction.
Hans Christian Oersted discovered the principle of electromagnetic induction.
Name one way to increase the magnetic force of an electromagnet.
Name one way to increase the magnetic force of an electromagnet.
Quelles substances sont considérées comme ferromagnétiques?
Quelles substances sont considérées comme ferromagnétiques?
Un aimant permanent possède une faible rémanence magnétique.
Un aimant permanent possède une faible rémanence magnétique.
Quel est le rôle des domaines dans le magnétisme du fer?
Quel est le rôle des domaines dans le magnétisme du fer?
Le __________ est la région de l'espace où une force magnétique peut agir.
Le __________ est la région de l'espace où une force magnétique peut agir.
Associez les termes suivants avec leur définition:
Associez les termes suivants avec leur définition:
Quel phénomène est décrit par le terme 'électromagnétisme'?
Quel phénomène est décrit par le terme 'électromagnétisme'?
Les électrons en mouvement créent un champ magnétique.
Les électrons en mouvement créent un champ magnétique.
Comment peut-on démagnétiser un aimant?
Comment peut-on démagnétiser un aimant?
Quelle est la définition d'un solénoïde?
Quelle est la définition d'un solénoïde?
Un électroaimant a des polarités fixes qui ne peuvent pas changer.
Un électroaimant a des polarités fixes qui ne peuvent pas changer.
Quelle règle est utilisée pour représenter le champ magnétique?
Quelle règle est utilisée pour représenter le champ magnétique?
L'induction électromagnétique consiste à générer un courant électrique dans un conducteur en faisant varier un __________ par rapport à ce conducteur.
L'induction électromagnétique consiste à générer un courant électrique dans un conducteur en faisant varier un __________ par rapport à ce conducteur.
Associez chaque méthode de renforcement d'un électroaimant avec son effet:
Associez chaque méthode de renforcement d'un électroaimant avec son effet:
Quel énoncé est vrai concernant les différences entre un aimant et un électroaimant?
Quel énoncé est vrai concernant les différences entre un aimant et un électroaimant?
Les électroaimants sont utilisés dans des dispositifs tels que les grues à __________.
Les électroaimants sont utilisés dans des dispositifs tels que les grues à __________.
Qui a découvert le principe de l'induction électromagnétique?
Qui a découvert le principe de l'induction électromagnétique?
Flashcards
Magnet
Magnet
An object that can attract objects containing iron, nickel, or cobalt.
Magnetism
Magnetism
The collection of phenomena caused by magnets.
Magnetic Pole
Magnetic Pole
One of two points on a magnet where the magnetic force is strongest, called north and south.
Magnetic Field
Magnetic Field
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Ferromagnetic Substance
Ferromagnetic Substance
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Magnetic Remanence
Magnetic Remanence
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Electromagnetism
Electromagnetism
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Magnetization by Electricity
Magnetization by Electricity
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Conventional Current
Conventional Current
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Solenoid
Solenoid
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How can you increase the strength of an electromagnet?
How can you increase the strength of an electromagnet?
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Electromagnetic Induction
Electromagnetic Induction
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How can you induce an Electric Current?
How can you induce an Electric Current?
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Hans Christian Oersted
Hans Christian Oersted
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Domaines Magnétiques
Domaines Magnétiques
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Champ Magnétique Terrestre
Champ Magnétique Terrestre
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Pôle Nord d'un Aimant
Pôle Nord d'un Aimant
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Rémanence Magnétique
Rémanence Magnétique
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Aimant Temporaire
Aimant Temporaire
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Aimant Permanent
Aimant Permanent
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Électromagnétisme
Électromagnétisme
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Découverte d'Oersted
Découverte d'Oersted
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Courant Conventionnel
Courant Conventionnel
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Solénoïde
Solénoïde
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Électroaimant
Électroaimant
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Comment augmenter la force d'un électroaimant ?
Comment augmenter la force d'un électroaimant ?
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Induction électromagnétique
Induction électromagnétique
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Comment générer un courant par induction ?
Comment générer un courant par induction ?
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Pôles magnétiques d'un solénoïde
Pôles magnétiques d'un solénoïde
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Différences entre un aimant et un électroaimant
Différences entre un aimant et un électroaimant
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Study Notes
Magnetism
- Magnet: An object that attracts iron, nickel, or cobalt
- Magnetism: The phenomena caused by magnets
Magnets
- Ferromagnetism in Iron: Iron can become magnetized because it has domains of tiny magnets.
- Electron Spin: Electron spin creates these tiny magnets in the domains.
- Domain Alignment: When placed in a magnetic field, the domains align, creating a stronger magnetic field.
- Non-magnetized iron: Domains are randomly oriented, cancelling magnetic fields.
- Magnetized iron: Domains are aligned in the same direction, creating a net magnetic field.
Earth's Magnetic Field
- Shape: Earth's magnetic field resembles a bar magnet; distorted by solar wind.
- Location: The North magnetic pole is near Canada, and is not at the geographical North Pole.
- Solar Wind: The stream of charged particles from the sun.
- Protection: Earth's magnetic field deflects most solar particles, protecting the Earth.
Magnetic Forces
- Two Poles: Magnets have a north and south pole.
- Attraction and Repulsion: Opposite poles attract, and like poles repel.
- Monopole: A single magnetic pole does not exist.
Magnetic Fields
- Definition: The region of space where a magnetic force can act on a magnet.
- Direction: Conventionally, lines leave the north pole and enter the south pole.
- Intensity: Strongest near the poles where the magnetic field lines are closer together.
- Shape: The shape of the magnetic field depends on the shape of the magnet.
Magnetization of Materials
- Ferromagnetic Substances: Materials (iron, nickel, cobalt) that can acquire magnetic properties.
- **Magnetization:**The ability of a material to acquire a magnetic character from a source.
- Non-permanet Magnet: These temporary magnets can be demagnetized easily (by hammering them).
- Permanet Magnet: These magnets are difficult to demagnetize.
Electromagnetism
- Definition: The interaction between electricity and magnetism.
- Oersted's Discovery: A current-carrying wire creates a magnetic field around it.
- Current Direction and Magnetic Field: The direction of the magnetic field depends on the current's direction.
Electromagnets
- Definition: Magnets created by electricity.
- Controlling the Magnetic Field: Turning the current on and off with electricity allows to control the electromagnet.
- Varying Intensity: The intensity (strength) of an electromagnet can be changed by altering the current or the number of coils.
- Applications: Used in various applications like electric motors, generators, and lifting scrap metal.
Electromagnetic Induction
- Definition: Generating an electric current by changing a magnetic field.
- Moving Magnets/ Conductors: The motion of a magnet near, or within, a conductor, or the motion of a conductor within a magnetic field, can induce an electric current in the conductor.
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