All Flashcards
Label the poles and field lines of a bar magnet.
Field lines emerge from the North pole and enter the South pole.
Label the diagram of magnetic domains under an external field.
Individual magnetic domains align under an external field, magnetizing the material.
Compare and contrast the Right-Hand Rule (RHR) and Right-Hand Curl Rule (RHCR).
RHR: Thumb = velocity, fingers = B field, palm = force (on moving charge). RHCR: Thumb = current, fingers = B field (around a wire).
Define magnetic domains.
Regions within a material where atomic magnetic moments are aligned, creating a small area of uniform magnetization.
What are magnetic field lines?
Visual representations of a magnetic field, indicating the direction a north pole would move; density indicates field strength.
Define magnetic dipole.
A pair of equal and opposite magnetic poles separated by a distance, behaving like tiny magnets.
What is the SI unit for magnetic field strength (B)?
Tesla (T). 1 T = Ns/Cm
Define electromagnet.
A wire carrying an electric current that produces a magnetic field around it.
What is ?
Permeability of free space, a constant that relates the magnetic field to the current producing it.