A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a…

A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field B→. Then the field inside the paramagnetic substance is:

  1. B→
  2. Zero
  3. much large than B→ and parallel to B→
  4. much large than B→ but opposite to B→

Solution

When magnetic field is applied diamagnetic substance produces magnetic field in opposite direction so net magnetic field will be zero.

Asked in: JEE Main 2020 (03 Sep Shift 2)

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