If a coil is wound around a steel core and electric current is passed through the coil, the steel core acts as a?(a) Electromagnet(b) Permanent magnet(c) Neither electromagnet nor permanent magnet(d) Either electromagnet or permanent magnetThe question was asked at a job interview.Enquiry is from Magnetic Field of a Solenoid topic in chapter Electromagnetism of Basic Electrical Engineering

If a coil is wound around a steel core and electric current is passed

1.	If a coil is wound around a steel core and electric current is passed through the coil, the steel core acts as a?(a) Electromagnet(b) Permanent magnet(c) Neither electromagnet nor permanent magnet(d) Either electromagnet or permanent magnetThe question was asked at a job interview.Enquiry is from Magnetic Field of a Solenoid topic in chapter Electromagnetism of Basic Electrical Engineering
Answer» Right answer is (b) Permanent magnet The best explanation: When a coil is wound around a steel CORE, the steel core behaves like a permanent magnet because it is a ferromagnetic material and once it becomes MAGNETIC it does not LOSE its magnetic property.

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