Question

When a soft iron bar is introduced inside a current carrying solenoid the magnetic field inside the solenoid will?

• A. Reduce to zero
• B. Decrease
• C. Increase
• D. Remain unaffected

Answer 1

The correct option is C Increase

The introduction of a soft iron core increases the net magnetic field inside the solenoid. The iron core concentrates the magnetic field to strengthen the magnetic field.
Such cores are common in electromagnets used in the industry.
Thus, option 'c' is the correct answer.