Magnetism And Electromagnetism Multiple Choice Questions and Answers

26.  The use of permanent magnets is not made in

   A. Magnetoes

   B. Energy metres

   C. Transformers

   D. Loudspeakers

27.  Supermagnetic materials are composed of

   A. Ferromagnetic particles in ferromagnetic matrix

   B. Non-ferromagnetic particles in ferromagnetic matrix

   C. Ferromagnetic particles in non-ferromagnetic matrix

   D. None of the above

28.  Susceptibility is positive for

   A. Non-magnetic substances

   B. Diamagnetic substances

   C. Ferromagnetic substances

   D. None of the above

29.  One maxwell is equal to

   A. 10^-8 webers

   B. 10⁴ webers

   C. 10^-4 webers

   D. 10⁸ webers

30.  One tesla is equal to

   A. 1 wb/mm²

   B. 1 wb/m

   C. 1 wb/m²

   D. 1 mwb/m²

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