posted by Will .
1.How can you easily increase the magnetic field strength inside a current-carrying coil?
2.What is a magnetic domain? What is the difference between an ordinary iron nail and a permanent magnet? How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
1. Increase the current
2. In a permanent magnet, the orbital currents of the electrons inside atoms are preferentially aligned in a certain direction.
A magnetic domain is region in which the magnetic fields of atoms are aligned.