A long thin hollow metallic cylinder of radius `'R'` has a current `i` ampere. The magnetic induction `'B'` -away from the axis at a distance `r` from the axis varies as shown in

A current of I ampere flows along an infinitely long straight thin walled hollow metallic cylinder of radius r. The magnetic field at any point inside the cylinder at a distance x from the axis of the cylinder is

A thin, straight conductor lies along the axis of a hollow conductor of radius R . The two carry equal currents in the same direction. The magnetic field B is plotted against the distance r from the axis. Which of the following best represents the resulting curve?

A circular coil of radius R carries an electric current i. The magnetic field at a point on the axis at a distance x from the centre of the coil (xgtgtR) varies as

A circular coil of wire of radius 'r' has 'n' turns and carries a current 'I'. The magnetic induction (B) at a point on the axis of the coil at a distance sqrt3r from its centre is

A long cylinder wire of radius R carries a unifrom current I flowing through it. The varaiaiton of magnetic field with distance 'r' from the axis of the wire is shown by .

A current I flows along a thin-walled, long, half-cylinder of radius R(figure) Find the magnetic induction at a point on the axis of the cylinder

A thin but long, hollow, cylindrical tube of radius r carries a current i along its length. Find the magnitude of the magnetic field at a distance r/2 from the surface (a) inside the tube (b) outside the tube.

A thin but long, hollow, cylindrical tube of radius r carries a current i along its length. Find the magnitude of the magnetic field at a distance r/2 from the surface (a) inside the tube (b) outside the tube.