Vibration Magnetometer

Two bar magnets placed together in a vibration magnetometer take 3 seconds for 1 vibration. If one magnet is reversed, the comnination takes 4 seconds for 1 vibration. Find the ration of their magnetic moments.

Two similar magnets of magnetic moments M_(1) and M_(2) are taken and vibrated in vibration magnetometer with their like pole together and unlike pole together . If ratio of (M_(1))/(M_(2)) = (5)/(3) , then ratio of the period is

Two magnets A and B are identical in mass, length and breadth but have different magnetic moments. In a vibration magnetometer, if the time period of B is twice the time period of A . The ratio of the magnetic moment M_(A)//M_(B) of the magnets will be

A vibrations magnetometer consists of two indentical bar magnet placed one over the other that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is 2^(5//4) s. One of the magnets is removed and if the other magnet oscillates in the same field, then the time period in second is :

A short bar magnet having magnetic moment 4 Am^2 , placed in a vibrating magnetometer, vibrates with a time period of 8 s. Another short bar magnet having a magnetic moment 8Am^2 vibrates with a time period of 6 s. If the moment of inertia of the second magnet is 9 xx 10^(-2) kgm^2 , the moment of inertia of the first magnet is (assuming that both magnets are kept in the same uniform magnetic induction field):

A bar magnet makes 40 oscillations per minute in an oscillation magnetometer. An identical magnet is demagnetized completely and is placed over the magnet in the magnetometer. Find the time taken for 40 oscillations by this combination. Neglect any induced magnetism.

A deflection magnetometer can be used for measuring –