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 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 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 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.
At a place where angle of dip is 45^(@) , a magnet oscillates with 30 oscillations per minute. At another place where angle of dip is 60^(@) , the same magnet makes 20 oscillations per minute The ratio of total magnetic fields 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
At a certain place a magnet makes 30 oscillations per minute. At another place where the magnetic field is double, its time period will be
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.
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
