1.

A bar magnet A of magnetic moment MA is found to oscillate at a frequency twice that of magnet B of magnetic moment MB when placed in a vibrating magneto-meter. We may say that                                                            [MP PMT 1991]

A.            \[{{M}_{A}}=2{{M}_{B}}\]      
B.            \[{{M}_{A}}=8{{M}_{B}}\]
C.            \[{{M}_{A}}=4{{M}_{B}}\]      
D.            \[{{M}_{B}}=8{{M}_{A}}\]
Answer» D.            \[{{M}_{B}}=8{{M}_{A}}\]


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