Magnetic Field Due to Current through a Circular Loop
When a soft i...
Question
When a soft iron core is introduced in a coil, the strength of the magnetic field:
A
increases
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B
decreases
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C
remains the same
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D
will become 0
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Solution
The correct option is Aincreases
When a soft iron core is introduced, the strength of the magnetic field increases. In the given figure, the field due to the coil with the iron core will be greater than the field due to the coil if the iron core were not present.
When we switch on the current, the coil becomes an electromagnet. But also, the soft iron core becomes a magnet. It will add to the strength of the electromagnet.