किसी बाह्य चुम्बकीय क्षेत्र में कोई कोमल लौह चुम्बकीय पदार्थ रखा है। चुम्बकीय डोमेनों :

  1. के आकार में वृद्धि होगी परन्तु उनके अभिविन्यासों में परिवर्तन नहीं होगा।
  2. के आकार में कमी होगी और अभिविन्यासों में भी परिवर्तित होगा।
  3. के आकार में कमी और वृद्धि हो सकती है और उनके अभिविन्यासों में परिवर्तन होगा।
  4. का बाह्य चुम्बकीय क्षेत्र से कोई संबंध नहीं है।

Answer (Detailed Solution Below)

Option 3 : के आकार में कमी और वृद्धि हो सकती है और उनके अभिविन्यासों में परिवर्तन होगा।
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JEE Main 04 April 2024 Shift 1
12.4 K Users
90 Questions 300 Marks 180 Mins

Detailed Solution

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CONCEPT:

Ferromagnetic material - Ferromagnetic material is defined as the material when the magnetic field is applied to the material it is aligned in the direction of the applied magnetic field and when the magnetic field is removed it will align in the same direction as before. Therefore, it is having a permanent magnetic field.

The susceptibility is positive in the ferromagnetic material.

EXPLANATION:

The soft ferromagnetic material is defined as soft magnetic materials which are easy to magnetize and demagnetize.These materials are used for making temporary magnets. Atoms of ferromagnetic material in an unmagnetized state from domains inside the ferromagnetic material. When an external field is applied, the domains experience a net torque hence changing their orientation.

Therefore, it may increase or decrease in size and its orientation will change.

Hence, option 3) is the correct answer.

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