Q.

 Two ferromagnetic materials X & Y have hysteresis curves of the shapes shown

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a

 X and Y are suitable for making a permanent magnet as well as an electromagnet. 

b

X is more suitable for making a permanent magnet while Y is more suitable for making an electromagnet 

c

X is more suitable for making an electromagnet while Y is more suitable for making a permanent magnet.

d

neither X nor Y is suitable for making either a permanent magnet or an electromagnet.

answer is B.

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Detailed Solution

For ferromagnetic material X, the area of hysteresis loop is large and thus high energy loss so it is  suitable for making a permanent magnet, while for Y, the area of hysteresis loop is less, so it is  suitable for making an electro magnet

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