Two insulated rings, one of a slighlty smaller diameter than the other are suspended along their common diameter as shown. Initially the planes of the rings are mutually perpendicular. When a steady current is set up each of them

The moment of intertia of a disc about an axis passing through its centre and normal to its plane is I. The disc is now folded along a diameter such that the two halves are mutually perpendicular. Its moment of inertia about this diameter will now be

The moment of intertia of a disc about an axis passing through its centre and normal to its plane is I. The disc is now folded along a diameter such that the two halves are mutually perpendicular. Its moment of inertia about this diameter will now be

Two coins of diameter 2 cm and 4 cm respectively are kept one over the other as shown in the figure, find the area of the shaded ring shaped region in square cm.

Two coins of diameter 2 cm and 4 cm respectively are kept one over the other as shown in the figure the area of the shaded ring shaped region is ___ square cm.

A circular coil of Radius R is folded across its diameter such that the planes of two half rings are perpendicular to each other as shown in the figure. If the current through the coil is calculate the magnetic dipole moment of the configuration so formed.