Describe the force produced when magnets are brought together, Describe the difference between permanent and induced magnets, GCSE / IGCSE Physics, notes
Alnico magnets are widely used in industrial and consumer applications where strong permanent magnets are needed; examples are electric motors, electric guitar pickups, microphones, sensors, loudspeakers, magnetron tubes, and cow magnets. In many applications they are being superseded by rare earth ...
which has a high value for permanent magnets.Bitself does not become zero untilHhas reached a negative value. The value ofHfor whichBis zero is called thecoercive force. A further increase inH(in the negative direction) causes the flux density to reverse and finally to reach saturation again...