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

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

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

   A. Copper

   B. Aluminium

   C. Soft iron

   D. Brass

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

25.  Gilbert is a unit of

   A. Electromotive force

   B. Magnetomotive force

   C. Conductance

   D. Permittivity

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