Podcast
Questions and Answers
When solenoid's current is doubled, what happens to its magnetic field?
When solenoid's current is doubled, what happens to its magnetic field?
Doubles in strength
If iron filings are sprinkled around a magnet, what pattern will they form?
If iron filings are sprinkled around a magnet, what pattern will they form?
Field lines from north to south
How can a technician reverse the polarity of an electromagnet?
How can a technician reverse the polarity of an electromagnet?
Reverse the direction of current flow
What factor does NOT affect the strength of a solenoid's magnetic field?
What factor does NOT affect the strength of a solenoid's magnetic field?
Which material is ferromagnetic?
Which material is ferromagnetic?
What happens to a ferromagnetic material above its Curie temperature?
What happens to a ferromagnetic material above its Curie temperature?
What is the SI unit of magnetic flux density?
What is the SI unit of magnetic flux density?
What is hysteresis in ferromagnetic materials?
What is hysteresis in ferromagnetic materials?
What type of material is weakly repelled by a magnetic field?
What type of material is weakly repelled by a magnetic field?
What term describes a magnet created by electric current in a coil?
What term describes a magnet created by electric current in a coil?
Why do solenoids produce a magnetic field?
Why do solenoids produce a magnetic field?
Why are ferromagnetic materials useful in electromagnets?
Why are ferromagnetic materials useful in electromagnets?
Why does an iron core increase a solenoid's magnetic field strength?
Why does an iron core increase a solenoid's magnetic field strength?
How does a soft magnetic material behave?
How does a soft magnetic material behave?
Why does a paramagnetic material not retain magnetization?
Why does a paramagnetic material not retain magnetization?
How does an electromagnet differ from a permanent magnet?
How does an electromagnet differ from a permanent magnet?
Flashcards
Solenoid's Current Doubled Effect
Solenoid's Current Doubled Effect
The magnetic field doubles in strength.
Iron Filing Pattern Around Magnet
Iron Filing Pattern Around Magnet
They form field lines arranging from the north pole to the south pole.
Reverse Electromagnet Polarity
Reverse Electromagnet Polarity
Reverse the direction of current flow.
Unaffecing Solenoid Strength Factor
Unaffecing Solenoid Strength Factor
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Ferromagnetic Material Example
Ferromagnetic Material Example
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Ferromagnetic Material Above Curie Temperature
Ferromagnetic Material Above Curie Temperature
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SI unit of magnetic flux density
SI unit of magnetic flux density
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Hysteresis
Hysteresis
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Material weakly repelled by the magnetic field
Material weakly repelled by the magnetic field
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Magnet Created Using Electric Current
Magnet Created Using Electric Current
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Solenoid's Magnetic Field
Solenoid's Magnetic Field
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Ferromagnetic Use in Electromagnets
Ferromagnetic Use in Electromagnets
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Iron Core Effect
Iron Core Effect
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Soft Magnetic Material
Soft Magnetic Material
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Paramagnetic Material Does Not Retain Magnetization
Paramagnetic Material Does Not Retain Magnetization
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Electromagnet vs. Permanent Magnet
Electromagnet vs. Permanent Magnet
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Study Notes
- If a solenoid's current doubles, its magnetic field doubles in strength.
- When iron filings are sprinkled around a magnet, they form field lines from north to south.
- A technician can reverse an electromagnet's polarity by reversing the direction of current flow.
- Voltage across the coil does NOT affect the strength of a solenoid's magnetic field.
- Iron is a ferromagnetic material.
- A ferromagnetic material loses its magnetism above its Curie temperature.
- The SI unit of magnetic flux density is Tesla (T).
- Hysteresis in ferromagnetic materials refers to the lag between magnetization and the applied field.
- Diamagnetic materials are weakly repelled by a magnetic field.
- An electromagnet is a magnet created by electric current in a coil.
- Solenoids produce a magnetic field due to the current flowing through coiled wire.
- Ferromagnetic materials enhance and retain strong magnetic fields, making them useful in electromagnets.
- An iron core increases a solenoid's magnetic field strength by increasing permeability and magnetic domain alignment.
- Soft magnetic materials easily gain and lose magnetization.
- Paramagnetic materials do not retain magnetization because their atomic magnetic moments align only in external fields.
- An electromagnet differs from a permanent magnet because it requires electric current to generate a field.
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