All Flashcards
Compare ferromagnetic and paramagnetic materials.
Ferromagnetic: Can be permanently magnetized, strong interaction. Paramagnetic: Weakly attracted, temporary alignment.
Compare paramagnetic and diamagnetic materials.
Paramagnetic: Weakly attracted, dipoles align temporarily. Diamagnetic: Weakly repelled, dipoles align opposite to field.
Compare ferromagnetic and diamagnetic materials.
Ferromagnetic: Strongly attracted, can be permanently magnetized. Diamagnetic: Weakly repelled.
Differentiate between magnetic monopoles and dipoles.
Monopoles: Theoretical, single north or south pole. Dipoles: Real, always have both north and south poles.
Compare the alignment of magnetic domains in ferromagnetic, paramagnetic, and diamagnetic materials in the presence of an external magnetic field.
Ferromagnetic: Domains strongly align and remain aligned. Paramagnetic: Domains weakly and temporarily align. Diamagnetic: Electron dipole moments align opposite to the field.
How do you determine the direction of magnetic force on a positive charge using the right-hand rule?
Point your thumb in the direction of the velocity, your fingers in the direction of the magnetic field, and your palm will point in the direction of the force.
How do you determine the direction of magnetic force on a current-carrying wire using the right-hand rule?
Point your thumb in the direction of the current, your fingers in the direction of the magnetic field, and your palm will point in the direction of the force on the wire.
What are the steps to apply Ampère’s Law?
- Choose an Amperian loop. 2. Calculate the line integral of the magnetic field around the loop. 3. Determine the current enclosed by the loop. 4. Apply the formula: .
What is the effect of breaking a bar magnet in half?
You get two smaller bar magnets, each with its own north and south pole.
What happens when like poles of magnets are brought together?
They repel each other.
What happens when opposite poles of magnets are brought together?
They attract each other.
What is the effect of an external magnetic field on a magnetic compass?
The compass aligns itself with the external magnetic field.
What is the effect of temperature on the permeability of a material?
Permeability can change with temperature.
What is the effect of increasing the density of magnetic field lines?
The strength of the magnetic field increases.