Q. Electromagnet is constructed with which of the following ?
Answer: Soft Iron
Notes: An electromagnet is a type of magnet in which the magnetic field is produced by an electric current in a solenoid. 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 as compared to steel that changes into permanent magnet. The soft iron core of the electromagnet also makes the magnetic field stronger.