How are the two bar magnets shown alongside stored?

Explain how magnets should be stored.

The magnetism of a bar magnet is due to

A wire is placed between the poles of twofixed bar magnets as shown in the figure. A small current in the wire is into the plane of the paper. The direction of the magnetic force on the wire is

A bar magnet oscillates in a region of uniform magnetic field with time period T . Now , a piece of wood identical in all respects in terms of mass and length is joined with bar magnet as shown . The new time period of oscillation is

Magnetic length of a bar magnet is

Three cubes , each of edge 8 cm , are joined as shown alongside . Find the total surface area and the volume of the cuboid.

Five equal resistances each of value R are connected in a form shown alongside. The equivalent resistance of the network

A small iron bar is kept near the north pole of a bar magnet. How does the iron bar acquire magnetism ? Draw a diagram to show the polarity on the iron bar. What will happen if the magnet is removed ?

Will the method shown in Figure (b) work if bar magnets of unequal strengths are used?

Which property of light can be proved using the set-up shown alongside?