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What is the function of soft iron core in d.c. motor?

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Question

What is the function of soft iron core in d.c. motor?

Short Answer
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Solution

The soft iron core is a laminated cylinder mounted on the axle. Its function is to provide a strong magnetic field when current flows through the coil wound around it. It also concentrates the magnetic flux and, because it is laminated, reduces eddy-current losses. The coil is wound over this core and rotates with it.

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Chapter 9: 1. Electromagnetism 2. Magnetic Effects of Electric Current 3. Electromagnetic Induction - EXERCISE-1 [Page 208]

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Goyal Brothers Prakashan A New Approach to ICSE Physics [English] Class 10
Chapter 9 1. Electromagnetism 2. Magnetic Effects of Electric Current 3. Electromagnetic Induction
EXERCISE-1 | Q 11. (d) | Page 208
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