Magnetic Circuit Objective Questions and Answers


16.  Conductivity is analogous to


   A. Retentivity

   B. Resistivity

   C. Permeability

   D. Inductance


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C. Permeability

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17.  Conductance is analogous to


   A. Permeance

   B. Reluctance

   C. Flux

   D. Inductance


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A. Permeance

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18.  Material for good magnetic memory should have


   A. Low hysteresis loss

   B. High permeability

   C. Low retentivity

   D. High retentivity


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D. High retentivity

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19.  Hard steel is suitable for making permanent magnets because


   A. It has good residual magnetism

   B. Its hysteresis loop has large area

   C. Its mechanical strength is high

   D. Its mechanical strength is low


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A. It has good residual magnetism

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20.  Permanent magnets are normally made of


   A. Alnico alloys

   B. Aluminium

   C. Cast iron

   D. Wrought iron


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A. Alnico alloys

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