In fact, however, the N-pole side and the S-pole side are excited through the same field winding, which means that this model shows MMF that is only half the actual value.
事实上,N极边和s极边由相同的励磁绕组励磁,这意味着模型中的磁动势只是实际磁动势的一半。
2
The Earth torque is one example, where the magnetic sPole is tugged back each day, creating more stress on the plates in the Pacific and allowing the Atlantic to widen.