When a short bar magnet is kept in tan A position on a deflection magnetometer, the magnetic needle oscillates with a frequency `'f'` and the deflection produced is `45^(0)`. If the bar magnet is removed find the frequency of osicullation of that needle ?

A deflection magnetometer is adjusted and a magnet of magnetic moment M is placed on it in the usual manner and the observed deflection is theta. The period of oscillation of the needle before setting of the deflection is T. When the magnet is removed, the period of oscillation of the needle is T_(0) before setting to 0^(@). If the eart's induced magnetic field is B_(H) , the relation between T and T_(0) is

A small magnetic needle performs 10 oscillations/minute in the earth's horizontal magnetic field . When a bar magnet is placed near the small magnet in same position , frequency of oscillations becomes 10sqrt2 oscillations/minute . If the bar magnet be turned around end to end , the rate of oscillation of small magnet will become

A small magnetic needle performs 10 oscillations/minute in the earth's horizontal magnetic field . When a bar magnet is placed near the small magnet in same position , frequency of oscillations becomes 10sqrt2 oscillations/minute . If the bar magnet be turned around end to end , the rate of oscillation of small magnet will become

A magnetic needle made of iron is suspended in a uniform external magnetic field. It experiences a torque and the needle starts oscillating. Write down the frequency of oscillation of the magnetic needle.

When a bar magnet is placed at some distance along the axis of the magnetic needle of an oscillation magnetometer located in earth's magnetic field, the needle makes 14 oscillaitons per minute. If the bar magnet is turned so that its poles exchange their positions, the needle makes 20 oscillations per minute. If the magnet is completely removed, the frequency of the needle is nearly ("assuming"BgtB_(H) "at needle")