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Which of the following is most suit for the core of an electromagnet?
1. Air
2. Soft Iron
3. Steel
4. None of these

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Correct Answer - Option 2 : Soft Iron

The correct answer is Soft Iron.

  • Soft iron is selected for making the core of an electromagnet because the core is used in a solenoid for the production of the strongest magnetism.

  •  The strongest continuous manmade magnetic field, 45 T, was produced by a hybrid device, consisting of a Bitter magnet inside a superconducting magnet.
    • The resistive magnet produces 33.5 T and the superconducting coil produces the remaining 11.5 T.
  • The magnetic field is strongest at the centre and weakest between the two poles just outside the bar magnet.
    • The magnetic field lines are densest at the centre and least dense between the two poles just outside the bar magnet.
    • The intensity of the field is weakest near the equator where it is horizontal.
    • The magnetic field's intensity is measured in gauss.
    • The magnetic field has decreased in strength through recent years.

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