Operating Principle
At least 3 different operating principles are used to make electric motors: magnetic, electrostatic and piezoelectric. By far the most common is magnetic.
Read more about this topic: Electric Motor
Famous quotes containing the words operating and/or principle:
“Many people operate under the assumption that since parenting is a natural adult function, we should instinctively know how to do it—and do it well. The truth is, effective parenting requires study and practice like any other skilled profession. Who would even consider turning an untrained surgeon loose in an operating room? Yet we “operate” on our children every day.”
—Louise Hart (20th century)
“The principle of all sovereignty resides essentially in the nation.”
—French National Assembly. Declaration of the Rights of Man (Sept. 1791)