Author Question: A piece of soft iron is placed in a solenoid increasing the magnetic field in an arrangement that ... (Read 155 times)

cherise1989 · **on:** Jul 29, 2018

A piece of soft iron is placed in a solenoid increasing the magnetic field in an arrangement that can be switched on and off. Such a device is called

A)

an electromagnet.
B)

an electrosolenoid.
C)

a permanent magnet.
D)

a ferromagnet.
E)

a hysteresis loop.

Question 2

Ferromagnetic materials lose their ability to form permanent magnets if

A)

aligned north and south.
B)

heated above their Curie temperature.
C)

cooled below their Curie temperature.
D)

the electrons lose their spin magnetic moment.
E)

aligned east and west.