A circular current carrying coil has a radius `r`. Its magnetic dipole moment is proportional to A) `r`, B) `r^(2)`, C) `(1)/(r)`, D) `(1)/(r^(2))`

A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be (1)/(8) th to its value at the centre of the coil, is

A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be (1//8)^(th) of its value at the centre of the coil is,

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

The radius of a circular current carrying coil is R. The distance on the axis from the centre of the coil where the intensity of magnetic field is (1)/(2sqrt(2)) times that at the centre, will be:

cosA+cosB+cosC is equal to (A) r/R (B) R/r (C) 1 (D) 1+r/R

The magnetic moment of a current I carrying circular coil of radius r and number of turns N varies as

Ratio of magnetic field at the centre of a current carrying coil of radius R and at a distance of 3R on its axis is

A circle of radius r cm has a diameter of length (a) r cm (b) 2r cm (c) 4r cm (d) r/2c m

The magnetic moment of a current (i) carrying circular coil of radius (r) and number of turns (n) varies as

The radius of a circular loop is r and a current i is flowing in it. The equivalent magnetic moment will be