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KCET2019PhysicsMagnetic Effects of Current

In a permanent magnet at room temperature

Options

  1. Adomains are partially aligned.
  2. Bmagnetic moment of each molecule is zero.
  3. Cdomains are all perfectly aligned.
  4. Dthe individual molecules have non-zero magnetic moment which are all perfectly aligned.

Correct answer

A. domains are partially aligned.

Step-by-step solution

(A) Even in the case of a permanent magnet all the domains are not perfectly aligned due to thermal agitations

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