Regarding the motor, I have a few more points to add
An electric machine can only function efficiently when its core is made of soft magnetic material such as electrical steel. Current-carrying coils generate magnetic fields that are amplified many times over by the electrical steel inside the coils, thus making operation of the motor much more efficient. The space inside the coils must be filled as densely as possible with soft magnetic material to ensure this amplification. A massive block of iron could theoretically be used for this purpose but would have the disadvantage of very high power consumption during operation. Stacks of thin, punched sheets are used in order to minimize the consumption of electricity.





