a magnate is suspended in such a way that it oscillates in the horizontal plane it makes 20 oscillations - Physics - Magnetism And Matter

Question

a magnate is suspended in such a way that it oscillates in the
horizontal plane it makes 20 oscillations per minute at a place
where dip angle is 30 and 15 oscillations per minute at a place
where dip angle is 60 the ratio of total earth magnetic field at
the two places is

Akansha Tyagi · Accepted Answer

No
of oscillations,n=12πBsinθI2015=B1sin30B2sin60B1(1/2)B2(3/2)=2023152=1
73=2 94≈3

a magnate is suspended in such a way that it oscillates in the horizontal plane .it makes 20 oscillations per minute at a place where dip angle is 30 and 15 oscillations per minute at a place where dip angle is 60.the ratio of total earth magnetic field at the two places is