What is the main difference between a permanent magnet and an electromagnet?
1 )
Permanent magnets are stronger than electromagnets
2 )
Permanent magnets have two poles while electromagnets have only one
Permanent magnets cannot be switched off while electromagnets can
4 )
Permanent magnets are made of iron while electromagnets are made of steel
تحلیل ویدئویی تست
منتظریم اولین نفر تحلیلش کنه!