The ratio of magnetic moments of two short magnets which gives null deflection in tan B position at 6 cm and 9 cm from the center of a deflection magnetometer is
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a
2 : 3
b
8 : 27
c
27 : 8
d
4 : 9
answer is B.
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Detailed Solution
According to question B∝Md3M1d13=M2d23 ⇒M1M2=d1d23⇒M1M2=693=233=827 .