A cylindrical metal rod of radius "R" carries a current l .The velocity of free electrons drifting at a distance r(

A cylindrical conductor of radius 'R' carries a current 'i' . The value of magnetic field at a point which is R//4 distance inside from the surface is 10 T . Find the value of magnetic field at point which is 4R distance outside from the surface

A non-homogeneous cylinder of radius "R" carries a current I whose current density varies with the radial "distance "r" from the centre of the rod as J=sigma r where sigma is a constant.The magnetic field at a point "P" at a distance r

A long cylindrical conductor of radius R carries a current i as shown in the figure. The current density J varies across the cross-section as J = kr^(2) , where, k is a constant. Find an expression for the magnetic field B at a distance r (lt R) from the axis

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 wire of diameter 0.02 metre contains 1028 free electrons per cubic metre. For an electrical current of 100 A , the drift velocity of the free electrons in the wire is nearly

A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the conductor is correctly represented by the figure:

The length of a current-carrying cylindrical conductor is l, its area of cross-section is A, the number density of free electrons in it is n, and the drift velocity of electrons in it is v_d . The number of electrons passing through a particular cross-section of the conductor per unit time is given by: