Advantage of using an electromagnet
2007-12-20 11:48 pm
What is the advanture of using an electromagnet in a motor rather than a permanent motor ?
回答 (3)
2007-12-21 5:19 am
✔ 最佳答案
1. using an electromagnet in a motor can save more $ since we can use the energy of magnetic field.2. it is more convinient as electrical energy is easy to obtain.
3. It can save energy since the area for acting force is larger.
2007-12-21 3:11 am
inside the motor it is a permanent magnet
not electromagnet
not electromagnet
2007-12-21 1:05 am
supply greater magnetic field strength
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