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AP EAMCET202124 Aug 2021Evening ShiftPhysicsMagnetic Properties of MatterActual

When a piece of a magnetic substance is put in a uniform magnetic field, the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material is

Options

  1. A1
  2. B2
  3. C3
  4. D4

Correct answer

D. 4

Step-by-step solution

Let magnetic flux density outside =B₀ Magnetic flux density inside a magnetic material, B=4 B₀ We know that, B= _r B_o where, _r= Magnetic permeability of material _r= B B₀ =4

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