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Solution


Q.

Assertion: Iron filings are kept near a magnet it gets arranged in a particular fashion.
Reason: Magnetic field is a scalar quantity
1 Both assertion and reason are correct and reason is the correct explanation of assertion.  
2 Both assertion and reason are correct, but reason is not the correct explanation of assertion.  
3 Assertion is true, but reason is false.  
4 Assertion is false, but reason is true.  

Ans.

(3)

Magnetic field is not a scalar quantity rather it is a vector quantity which has both magnitude and direction. So, when iron filings are placed around a magnet, they get arranged in a fashion similar to that of magnetic lines. Thus, assertion is correct, but reason is false.