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.
What is the effect of moving a charged particle through a magnetic field?
The charged particle experiences a magnetic force, causing it to curve (if velocity and magnetic field are not parallel).
What causes auroras near Earth's poles?
Charged particles from space spiral along Earth's magnetic field lines, colliding with atmospheric gases and emitting light.
What is the effect of aligning magnetic domains in a material?
The material becomes magnetized.
What happens to the magnetic force if a charged particle moves parallel to the magnetic field?
The magnetic force is zero.
What happens to the magnetic field strength as the distance from a current-carrying wire increases?
The magnetic field strength decreases.
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).
