PHY 2020 Chapter Notes - Chapter 24: Magnetic Domain, Electric Field, Electromagnet
Document Summary
Magnetic force: (1) between magnets, it is the attraction of unlike magnetic poles for each other and the repulsion between like magnetic poles. (2) Between a magnetic field and a moving charged particle, it is a deflecting force due to the motion of the particle: the deflecting force is perpendicular to the velocity of the particle and perpendicular to the magnetic field lines. This force is greatest when the charged particle moves perpendicular to the field lines and is smallest (zero) when it moves parallel to the field lines. Checkpoint 1: do both electrical forces and magnetic forces depend on motion: only the magnetic force requires motion. The forces that magnets exert on one another are similar to electrical forces because both can attract and repel without touching, depending on which ends of the magnets are held near one another. One end, called north-seeking pole, points northward, ad the opposite end, called the south-seeking pole, points southward.
