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JEE Main20202 Sep 2020Morning ShiftPhysicsAlternating CurrentActual

Magnetic materials used for making permanent magnets P and magnets in a transformer T have different properties of the following, which property best matches for the type of magnet required?

Options

  1. AT   : Large retentivity, small coercivity
  2. BP   : small retentivity, large coercivity
  3. CT   : Large retentivity, large coercivity
  4. DP : large retentivity, large coercivity

Correct answer

D. P : large retentivity, large coercivity

Step-by-step solution

As per the properties of Magnetic substances, materials favorable for permanent magnets should have high retentivity, large coercivity and high permeability.

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