Vibration or Oscillation Magnetometer

Vibration Magnetometer

A bar magnet of mass 100 g, length 7.0 cm, width 1.0 cm and height 0.50 cm takes pi/2 seconds to complete an oscillation in an oscillation magnetometer placed in a horizontal magnetic field of 25 muT . (a) Find the magnetic moment of the magnet. (b) If the magnet is put in the magnetometer with its 0.50cm edge horizontal, what would be the time period?

A bar magnet takes pi/10 second to complete one oscillation in an oscillation magnetometer. The moment of inetria of the magnet about the axis of rotation is 1.2 xx 10^(-4) kg m^2 and the earth's horizontal magnetic field is 30 muT . Find the magentic moment of the magnet.

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.

The combination of two bar magnets makes 20 oscillations per minute in an oscillation magnetometer when like poles are tied together and 5 oscillations per minute when unlike poles are kept together. Then ratio of the magnetic moment of magnets is

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

The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 150 ms. The magnet is cut along its length into three equal parts and three parts are then placed on each other with their like poles toghether. The time period of this combination (in ms) will be