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Q.

Given two bars A and B, out of which the bar A is magnetized and is marked with the north and south poles.


How can you identify whether bar B is magnetic or not?


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a

both ends of B are attracted to the north pole of a magnet

b

both ends of B are attracted to the South Pole of a magnet

c

One end of B is attracted and the other end is repelled by the north pole of the            magnet

d

both the end of B is ripple by the South Pole of a magnet 

answer is C.

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Detailed Solution

One end of B is attracted and the other end is repelled by the north pole of the magnet.
“Like poles of a magnet repel each other and unlike poles attract each other”. So one end of it is attracted, and the north pole of a magnet repels the other end. So a bar magnet suspended in Earth’s magnetic field orients itself in the north-south direction.
 
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Given two bars A and B, out of which the bar A is magnetized and is marked with the north and south poles.How can you identify whether bar B is magnetic or not?