A coil `ABD` of `N` turns `&` radius `R` carries a current of `1 Amp` `&` is placed on a horizontal tabel.`K` is a very small horizontal conducting ring of radius `r` placed at a distance `Y_(0)` from the centre of the coil vertically above the coil `ACD`.Find an expression for the `EMF` established when the ring `K` is allowed to fall freely.Express the `EMF` in terms of instanteous speed `v &` height `Y`.

A coil A of radius R and number of turns n carries a current i and it is placed in a horizontal plane. A small conducting ring P of radius r (r lt lt R) is placed at a height y_(0) above the centre of the coil A as shown in figure-5.38. Calculate the induced EMF in the ring when the ring in allowed to fall freely. Express the induced EMF as a function of instantaneous speed of the falling ring and its height above the center of the coil A.

A horizontal flat coil of radius a made of w turns of wire carrying a current sets up a magnetic field. A horizontal conducting ring of radius r is placed at a distance x_(0) from the centre of the coil (Fig. 30.6). The ring is dropped. What e.m.f. will be established in it? Express the e.m.f. in terms of the speed.

A circular coil of n turns and radius r carries a current I. The magnetic field at the centre is

The ratio of the magnetic field at the centre of a current carrying coil of the radius a and at distance 'a' from centre of the coil and perpendicular to the axis of coil is

The ratio of the magnetic field at the centre of a current carrying coil of the radius a and at distance 'a' from centre of the coil and perpendicular to the axis of coil is

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic field at the centre of the coil.

A circular coil of radius R carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at a distance r from the centre of the coil, such that r gtgt R , varies as

A circular coil of radius R carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at a distance r from the centre of the coil, such that r gtgt R , varies as