1.
The ratio of magnetic moments of two bar magnets is These magnets held together in a vibration magnetometer oscillate with 15 oscillations per minute in earth's magnetic field with like poles together. What will be the frequency of oscillations of system if unlike poles are together
2.
At the magnetic poles of the earth, a compass needle will be
3.
The length of magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 2 s. The magnet is cut along its length into three equal parts and these parts are then placed on each other with their like poles together. The time period of this combination will be
4.
A compass needle placed at a distance from a short magnet in a tan position shows a deflection of 60. If the distance is increased to , the deflection of compass needle is
5.
A deflection magnetometer is adjusted in the usual way. When a magnet is introduced, the deflection observed is, and the period of oscillation of the needle in the magnetometer is T. When the magnet is removed, the period of oscillation is The relation between T and is