The magnetic moment of a magnet of length $10\, cm$  and pole strength $ 4.0\, Am$  will be......$A{m^2}$

Two identical thin bar magnets each of length $l $ and pole strength $m$  are placed at right angle to each other with north pole of one touching south pole of the other. Magnetic moment of the system is

Two magnets, each of magnetic moment $‘M’ $ are placed so as to form a cross at right angles to each other. The magnetic moment of the system will be

Points $A$ and $B$ are situated perpendicular to the axis of a small bar magnet at large distances $x$ and $3 x$ from its centre on opposite sides. The ratio of the magnetic fields at $A$ and $B$ will be approximately equal to

The magnetic moment of the arrangement shown in the figure is ............. $M$

Two bar magnets with magnetic moments $ 2 M $ and $M$ are fastened together at right angles to each other at their centres to form a crossed system, which can rotate freely about a vertical axis through the centre. The crossed system sets in earth’s magnetic field with magnet having magnetic moment $2M $ making and angle  $ \theta $ with the magnetic meridian such that