51. Electromagnet is constructed with which of the following ? A.Steel B.Soft Iron C.Aluminium D.Nickel
Option B Solution: An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. It is made of soft iron since it has the property of losing its magnetism very quickly. The soft iron core of the electromagnet makes the magnetic field stronger.
