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  • Give answer! There are four light -weight -rod samples A,B,C,D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted(i) A is feebly repelled(ii) B is feebly attracted(iii) C is stron

There are four light -weight -rod samples A,B,C,D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted

(i) A is feebly repelled

(ii) B is feebly attracted

(iii) C is  strongly attracted

(iv) D remains unaffected

which one of the following is true?

  • Option 1)

    B is a paramagnetic material

  • Option 2)

    C is  of a diamagnetic material

  • Option 3)

    D is of a ferromagnetic material

  • Option 4)

    A is of a non-magnetic material

 

Answers (1)

 

Diamagnetic Substance -

B<B0, B/B0<1 or frac{mu}{mu_{0}}<, mu_{r} <1

Relative permeability of diamagnetic substance.

-

 

 

Ferromagnetic Substance -

The substance which are strongly magnetised in the direction of the magnetising field in which they are placed.

- wherein

Iron, cobalt, nicket, gadolinium and number of alloys are ferromagnetic in nature

 

 

Behaviour in a non-uniform magnetic field -

These are feebly attracted in an external magnetic field (in paramagnetic substance)

- wherein

 

 A represent diamagnetic 

B represent paramagnetic

C represent ferromagnetic 

D is non magnetic 

 


Option 1)

B is a paramagnetic material

This solution is correct 

Option 2)

C is  of a diamagnetic material

This solution is incorrect 

Option 3)

D is of a ferromagnetic material

This solution is incorrect 

Option 4)

A is of a non-magnetic material

This solution is incorrect 

Posted by

subam

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