Students will be able to
- recognize that if a current-carrying wire is placed in a magnetic field, there will be a force on it and it may move,
- recognize that the wire must be placed perpendicular to the magnetic field for the magnitude of the force to be greatest,
- recognize that if the wire is placed parallel to the field, there will be no force on it,
- work out the direction of the force using Fleming’s left-hand rule,
- use in all permutations.
Students should already be familiar with
- what electric current is,
- the idea that permanent magnets can attract or repel each other,
- what a force is.
Students will not cover
- cases in which the angle between the wire and the field is neither nor ,
- what happens in nonuniform magnetic fields/time-varying magnetic fields,
- what happens when the wire is curved/anything other than straight,
- what happens when the wire has an alternating current,
- the effect of magnetic fields on charged particles/beams of charged particles,
- torque on loops of wire.