A deflection megnetometer is placed with its arms in north-south direction. How and where should a short magnet having `M/B_H = 40 A m^2 T(-1)` be placed so that the needle can stay in any position?

A deflection magnetometer is placed with its arm along the east-west direction (tan A position) and a short bar magnet is placed symmetrically along its axis at some distance with its north pole pointing towards east. In this position the needle of the magnetometer shows a deflection of 60^(@) . If we double the distance of the bar magnet, then the deflection will be

A deflection magnetometer is placed with its arm along the east-west direction (tan A position) and a short bar magnet is placed symmetrically along its axis at some distance with its north pole pointing towards east. In this position the needle of the magnetometer shows a deflection of 60^(@) . If we double the distance of the bar magnet, then the deflection will be

A magnetic needle is placed with its north pole facing north in north south direction. In its map of magnetic field the null point will be

The magnetometer of the previous problem is used with the same magent in Tan-B position. Where should the magnet be placed to produce a 37^@ deflection of the needle?

The magnetometer of the previous problem is used with the same magent in Tan-B position. Where should the magnet be placed to produce a 37^@ deflection of the needle?

A small magnet of magnetic moment 4A-m2 is placed on a deflection magnetometer in tan-B position at a distance of 20cm from the compass needle. At what distance from compass needle should another small magnet of moment 0.5A-m^(2) be placed such that the deflection of the needle remains zero ?

A short magnet makes 40 oscillations per minute when used in an oscillation magnetometer at a place where the earth's horizontal magnetic field is 25 muT . Another short magnet of magnetic moment 1.6 A m^2 is placed 20 cm east of the oscillating magnet. Find the new frequency of oscillation if the magnet has its north pole (a) towards north and (b) towards south.

A short magnet makes 40 oscillations per minute when used in an oscillation magnetometer at a place where the earth's horizontal magnetic field is 25 muT . Another short magnet of magnetic moment 1.6 A m^2 is placed 20 cm east of the oscillating magnet. Find the new fregquency of oscillation if the magnet has its north pole (a) towards north and (b) towards south.

The needle of a deflection magnetometer deflects through 45^@ from north to south when the instrument is used in Tan-A position with a magnet of length 10cm placed at a distance of 25cm. (a) Find the magnetic moment of the magnet if the earth's horizontal magnetic field is 20 muT . (b) If the magnetometer is used in Tan-B position with the same magnet at the same separation from the needle, what will be the deflection?