In sum and difference method in vibration magnetometer, the time period is more if

Options

A. Similar poles of both magnets are on same sides
B. Popposite poles of both magnets are on same sides
C. Both magnets are perpendicular to each other
D. Nothing can be said

Answer

B

Explanation

In sum position: `T_(S)=2pisqrt(1_(s)/((M_(1)-M_(2))B_(H)))`
In difference position: `T_(d)=2pisqrt(1_(d)/((M_(1)-M_(2))B_(H)))`
It is clear that `T_(d)gtT_(s)`