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 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

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 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.

The vartical component of the earth's magnetic field is zero at a place where the angle of dip is

If the horizontal component of earth's magnetic field at a place where the angle of dip is 60^@ is 0*4xx10^-4T , calculate the vertical component and the resultant magnetic field at that place.

A bar magnet , held horizontally , is set into angular oscillations in the earth's magnetic field its time periods are T_(1) and T_2 at two places where the angles of dip are theta_(1) and theta_2 , respectively . The ratio of the resultant magnetic fields at these two places will be

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