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  • Help me solve this Hysteresis loops for two magnetic materials A and B are given below :These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use :

Hysteresis loops for two magnetic materials A and B are given below :

These materials are used to make magnets for electric generators, transformer core and electromagnet core.  Then it is proper to use :

  • Option 1)

     A for electric generators and transformers.

  • Option 2)

    A for electromagnets and B for electric generators.

  • Option 3)

    A for transformers and B for electric generators.

  • Option 4)

    B for electromagnets and transformers.

 

Answers (2)

best_answer

As we have learnt,

 

Retentivity -

When H=0 (after having increases from 0 to Hs), B=Br

Br - residual magnetism, retentivity

-

 

 

Coercivity (H) -

When H = Hc , B = 0

- wherein

i.e  Magnetising fields (H) required to destroy the residual magnetism.

 

 Material with higher value of refentivity and coerceivity is good to make permenent magnets i.e A

Graph B is for making electro-magnets and transformers.

 

 


Option 1)

 A for electric generators and transformers.

Option 2)

A for electromagnets and B for electric generators.

Option 3)

A for transformers and B for electric generators.

Option 4)

B for electromagnets and transformers.

Posted by

Avinash

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4 is true. 

  We  need less resistivity and less coercivity for electromagnetism and transformers. Hence small area of hysteresis loop.

Posted by

Kavya sree

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