A copper ring is suspended in a vertical plane by a thread. A steel bar is passed through the ring in a horizontal direction and then a magnet is similarly passed through. Will the motion of the bar and the magnet affect the position of the ring?

From where does the magnetic equator pass through India?

A copper ring is held horizontally and a bar magnetic is dropped through the ring with its length along the axis of the ring (shown in the figure) will the acceleration of the falling magnet be equal to , greater than or less than that due to gravity?

A copper ring having a cut such as not to form a complete loop is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. Then acceleration of the falling magnet is:

A mettalic wire is bent into a square of each side a. If a current I is passed through the wire, what is the magnetic field at the centre of the square?

The magnetic lines of force prefer to pass through iron than air. Explain why?

A plane passes through a fixed point (a, b, c) and direction ratios of the normal to the plane are (2, 3 , 4) find the equation of the plane

Find the equation of a st. line, which passes through the point (-2,3) and makes an angle of 60^@ with the positive direction of x-axis.

Find the moment of inertia of a thin circular ring about an axis passing through the centre and perpendicular to the plane of the ring