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What is the definition of magnetic permeability ($mu$)?
A measure of how easily a material can be magnetized; how much a material allows magnetic field lines to pass through it.
What is the permeability of free space ($mu_0$)?
The magnetic permeability in a vacuum; a fundamental constant in electromagnetism.
What is the definition of magnetic dipole moment ($vec{mu}$)?
A measure of an object's tendency to interact with a magnetic field; like a tiny magnet within a material.
Define Ferromagnetism.
A type of magnetism where a material exhibits a permanent magnetic moment even without an external magnetic field.
Define Paramagnetism.
A type of magnetism where a material exhibits temporary magnetism only in the presence of an external magnetic field.
Define Diamagnetism.
A property of materials that are repelled by magnetic fields, exhibiting negative permeability.
What is the effect of high magnetic permeability?
The material is easily magnetized.
What is the effect of aligned magnetic dipole moments?
Creation of a net magnetic field.
What happens when a diamagnetic material is placed in a magnetic field?
It is repelled by the magnetic field.
What happens when the current in a solenoid is doubled?
The magnetic field inside the solenoid doubles, assuming the permeability remains constant.
What happens when a material with a higher $\mu$ replaces a material with a lower $\mu$ inside a solenoid?
The magnetic field inside the solenoid increases.
What are the differences between $\mu$ and $\mu_0$?
$\mu$: Magnetic permeability of a material, varies with temperature, pressure, and external fields. | $\mu_0$: Permeability of free space (vacuum), a constant value.
What are the differences between Ferromagnetism and Paramagnetism?
Ferromagnetism: Permanent magnetic moment even without an external field. | Paramagnetism: Temporary magnetism only in the presence of an external field.
What are the differences between Paramagnetism and Diamagnetism?
Paramagnetism: Attracted to magnetic fields, temporary magnetism. | Diamagnetism: Repelled by magnetic fields, negative permeability.
Compare induced magnetism and permanent magnetism.
Induced magnetism: Dipoles align temporarily when an external field is applied. | Permanent magnetism: Dipoles are aligned even without an external field.