A) 7/3
B) 5/4
C) 7/4
D) 7/5
Correct Answer: B
Solution :
Let the magnetic moment of the two magnets be \[{{M}_{1}}\] and \[{{M}_{2}}\] Then, \[6=2\pi \,\sqrt{\frac{1}{({{M}_{1}}-{{M}_{2}})B}}\] and \[2=2\pi \,\sqrt{\frac{1}{({{M}_{1}}+{{M}_{2}})B}}\] \[\Rightarrow \,\,\frac{{{M}_{1}}+{{M}_{2}}}{{{M}_{1}}-{{M}_{2}}}={{\left( \frac{6}{2} \right)}^{2}}=9\] \[\therefore \,\,\frac{{{M}_{1}}}{{{M}_{2}}}=\frac{5}{4}\].You need to login to perform this action.
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