describe the attraction and repulsion between unlike and like poles for permanent magnets
describe the attraction and repulsion between unlike and like poles for permanent magnets
describe the characteristics of the magnetic field of a magnet, showing how strength and direction change from one point to another
explain how the behaviour of a magnetic compass is related to evidence that the core of the Earth must be magnetic
describe the difference between permanent and induced magnets
describe how to show that a current can create a magnetic effect
describe the pattern and directions of the magnetic field around a conducting wire
recall that the strength of the field depends on the current and the distance from the conductor
explain how the magnetic effect of a solenoid can be increased
explain how a solenoid can be used to generate sound in loudspeakers and headphones