Understand the fundamental principle that unlike magnetic poles attract each other, while like poles repel.
Describe the diverse applications of permanent and temporary magnetic materials, specifically cobalt, steel, iron, and nickel.
Analyze the physical and operational differences between permanent magnets and induced magnets.
Map the shape and direction of magnetic fields surrounding bar magnets, and relate the local strength of the field to the density of the magnetic field lines.
Describe the practical use of plotting compasses to experimentally map magnetic fields, including the Earth’s own magnetic field.
Explain how the behavior of freely suspended magnetic compasses provides evidence for the Earth's magnetic core.
Demonstrate that an electric current generates a magnetic field, and map the field's shape and direction around a long straight conductor relative to current flow.
Understand that the strength of an electromagnet's field is proportional to the current size and inversely proportional to the distance from the conductor.
Explain the magnetic field dynamics inside a solenoid, detailing how individual coil fields sum to create a strong uniform core field while cancelling externally to produce a weaker exterior field.
