A) 3 : 1
B) 1 : 3
C) 3 : 5
D) 5 : 4
Correct Answer: D
Solution :
In the sum and difference method of vibration magnetometer \[\frac{{{M}_{1}}}{{{M}_{2}}}=\frac{T_{2}^{2}+T_{1}^{2}}{T_{2}^{2}-T_{1}^{2}}\] Here, \[{{T}_{1}}=\frac{1}{{{n}_{1}}}=\frac{60}{12}=5s\] \[{{T}_{2}}=\frac{1}{{{n}_{2}}}=\frac{60}{4}=15\,\,s\] \[\therefore \] \[\frac{{{M}_{1}}}{{{M}_{2}}}=\frac{{{15}^{2}}+{{5}^{2}}}{{{15}^{2}}-{{5}^{2}}}=\frac{225+25}{225-25}=\frac{5}{4}\]You need to login to perform this action.
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