What happens to the strength of electromagnet if the soft iron core is put into it?

CONCEPT:

• 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.

EXPLANATION:

• When a soft iron core is inserted inside the solenoid then the strength of the magnetic field becomes very large because the iron core gets magnetized by induction.
• The soft iron core helps in concentrating the magnetic lines of forces through the solenoid so that the magnetic field is almost uniform at the end face of the core.
• Hence, the strength of the magnetic field increases when a soft iron core is inserted inside a solenoid. Therefore, option 1 is correct.

• The strength of an electromagnet can be increased by increasing the number of turns of wire around the iron core and by increasing the current or voltage.