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 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 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 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 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