Which of the following material is used to prepare a core of an electromagnet?
A
Hard iron
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B
Soft iron
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C
Coloured iron
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D
Rusted iron
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Solution
The correct option is B Soft iron The magnetic core is normally made up of a ferromagnetic or ferrimagnetic material such as iron; the soft iron makes it more stronger as it allows more magnetic lines pass through it easily and makes a more powerful magnet.