1.

A bar magnet having centre O has a length of 4 cm. Point P1 is in the broad side-on and P2 is in the end side-on position with OP1 = OP2 = 10 metres. The ratio of magnetic intensities H at P1 and P2 is                                      [MP  PET 1990]

A.            \[{{H}_{1}}:{{H}_{2}}=16:100\]                                         
B.            \[{{H}_{1}}:{{H}_{2}}=1:2\]
C.            \[{{H}_{1}}:{{H}_{2}}=2:1\]    
D.            \[{{H}_{1}}:{{H}_{2}}=100:16\]
Answer» C.            \[{{H}_{1}}:{{H}_{2}}=2:1\]    


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