| ASSERTION: An un magnetized piece of iron is attracted to a bar magnet. |
| REASON: An atom is equivalent to a current loop. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
Each atom behaves as tiny magnet. In iron these atoms are randomly oriented so that there is not any net magnetism. But when unmagnetized iron is brought near the bar magnet, the current loops located at the ends of the bar magnet and the iron piece facing each other align themselves. When they do so, the currents in the Current loops happen to be in same direction and as a consequence, the attractive force occurs between the two.
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