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State the purpose of soft iron core used...

State the purpose of soft iron core used in making an electromagnet.

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Soft iron rod increases the magnetism of solenoid by a thousand fold. When the solenoid current is switched off, the magnetism is effectively switched off since the soft iron core has low retentivity
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Knowledge Check

  • Soft iron is used for making electromagnet because it

    A
    has low retentivity.
    B
    has low coercivity.
    C
    small hysteresis loss.
    D
    all of these.

  • Soft iron is used in many electrical machines for:

    A
    low hysteresis loss and low permeability
    B
    low hysteresis loss and high permeability
    C
    high hysteresis loss and low permeability
    D
    high hysteresis loss and high permeability

  • Soft iron is used in many electrical machines for:

    A
    low hysteresis loss and low permeability
    B
    low hysteresis loss and high permeability
    C
    high hysteresis loss and low permeability
    D
    high hysteresis loss and high permeability

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