A compass needle oscillates `20` times per minute at a place where the dip is `30^(@)` and 30 times per minute where the dip is `60^(@`. The ratio of total magnetic field due to the earth at two places respectively is `4/(sqrtx)` . The value of `x` is

A compass needle oscillates 20 times per minute at a place where the dip is 45^@ and 30 times per minute where the dip is 30^@ . Compare the total magnetic field due to the earth at the two places.

A magnetic compass needl oscillates 30 times per minute at a place where the dip is 45^(@) and 40 times per minute where the dip is 30^(@) if B_(1) and B_(2) are respectively the total magnetic field due to the earth at the two places then the ratio B_(1)//B_(2) is best given by

A magnet 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 minute at a place where dip angle is 60^(@) . The ratio of total earth's magnetic field at the two places is

A magnet oscillating in a horizontal plane has a time period of 2 seconds at a place where the angle of dip is 30^(@) and 3 seconds at another place where the angle of dip is 60^(@) . The retio of resultant magnetic field at the two places is

At a certain place, the angle of dip is 30^(@) and the horizontal component of earth's magnetic field is 50muT . The total magnetic field (in muT ) of the earth at this place, is

A magnet oscillating in a horizontal plane, has a time period of 3 seconds at a place where the angle of dip is 30^(@) and 4 seconds at another place, where the dip is 60^(@) . Compare the resultant magnetic field at the two places.

A magnet is suspended so as to swing horizontally makes 50 vibrations//min at a place where dip is 30^(0) , and 40 vibration//min where dip is 45^(0) . Compare the earth's total fields at the two places.