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easyMCQAIEEE 20042026Physics
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The materials suitable for making electromagnets should have:

  1. A
    High retentivity and high coercivity
  2. B
    Low retentivity and low coercivity
  3. C
    High retentivity and low coercivity
  4. D
    Low retentivity and high coercivity

Solution & Step-by-step Explanation

An electromagnet should become strongly magnetic when current passes through it and should lose its magnetism as soon as the current is switched off. This requires:Low coercivity (so it's easy to demagnetize).Low retentivity (so it doesn't retain much magnetism).Soft iron is typically used because it satisfies these conditions and has high permeability.

Practice this question

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The materials suitable for making electromagnets should have:
A
High retentivity and high coercivity
B
Low retentivity and low coercivity
C
High retentivity and low coercivity
D
Low retentivity and high coercivity

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magnetismmagnetic materialselectromagnet

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