Magnetism And Electromagnetism Multiple Choice Questions and Answers


21.  The bar magnet has


   A. The dipole moment

   B. Monopole moment

   C. Both A and B

   D. None of the above


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A. The dipole moment

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22.  A key part is used to


   A. Change the direction of magnetic lines

   B. Amplify flux

   C. Restore lost flux

   D. Provide a closed path for flux


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D. Provide a closed path for flux

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23.  The commonly used material for shielding or screening magnetism is


   A. Copper

   B. Aluminium

   C. Soft iron

   D. Brass


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C. Soft iron

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24.  Paramagnetic materials have relative permeability


   A. Slightly less than unity

   B. Equal to Unity

   C. Slightly more than unity

   D. Equal to that ferromagnetic materials


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C. Slightly more than unity

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25.  Gilbert is a unit of


   A. Electromotive force

   B. Magnetomotive force

   C. Conductance

   D. Permittivity


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B. Magnetomotive force

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