Rare-earth metals in magnets for electric-car motors: what you need to know

Electric motor, shown in 'How Does an Electric Car Work?' video by Learn EngineeringIt's not surprising that the powertrains of electric cars differ quite a bit from traditional internal-combustion engines. Although they have fewer moving parts, the rare-earth magnets that help power electric cars can be quite complex to fabricate. So, what is there to know about rare-earth magnets—and how do automakers choose which kind of...