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Solution


Q.

Strength of the magnetic field at a point in the space surrounding the magnet is measured by:
1 thickness of the magnet.  
2 number of lines crossing a given point.  
3 resistance of it.  
4 length of the magnet.  

Ans.

(2)

The strength of the magnetic field at a point in the space surrounding the magnet is measured by number of lines crossing a given point.