Commercial motors used electromagnets instead of a permanent magnet. Commercial magnets have more number of turns of the conducting coil. A soft iron core is present in commercial magnets.
A industrial electric powered motor is one that makes use of the following (i) An electromagnet in vicinity of everlasting magnet. (ii) Large wide variety of turns accomplishing twine in modern-day sporting coil. (iii) A smooth iron middle on which the coil is wound. The aggregate of smooth iron middle and coil is an armature. The commercial electric motors uses magnet to rotate the armature. The commercial electric motors uses magnet to rotate the armature.
A business electric powered motor isn't the same as easy electric powered motor as it makes use of electromagnet withinside the area of everlasting magnet.
To obtain steady rotation the number of turns of the coils is increased. Thus, the answer to this question is option D. Note: The difference between a simple motor and a commercial motor is that a commercial motor requires a strong magnetic field so the permanent magnet is replaced by an electromagnet.
Field coils, not permanent magnets, are utilized in commercial electric motors to generate magnetic fields. A strong magnetic field is created by whirling a large number of wire turns on a soft iron core.