A long straight conductor having a circular cross-section carries a current such that its magnetic field varies with radial distance `r` as `B=cr^(a)` where a and c are constants. The variation of current density as the function of r is `(C)/(mu_(0))(a+k)r^(a+n)` .Find `k+n`

The current density in a wire of radius a varies with radial distance r as J=(J_0r^2)/a , where J_0 is a constant. Choose the incorrect statement.

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

A long wire having a semi-circular loop of radius r carries a current I, as shown in Fig. Find the magnetic field due to entire wire.

A long, thick straight conductor of radius R carries current I uniformly distributed in its cross section area.The ratio of energy density of the magnetic field at distance R//2 from surface inside the conductor and outside the conductor is:

A long straight wire of a circular cross section (radius a ) carrying steady current. Current is uniformly distributed in the wire. Calculate magnetic field inside the region (r lt a) in the wire.

A circular coil of radius R carries a current i . The magnetic field at its centre is B . The distance from the centre on the axis of the coil where the magnetic field will be B//8 is

Consider a long cylindrical wire carrying current along the axis of wire. The current distributed non-uniformly on cross section. The magnetic field B inside the wire varies with distance r from the axis as B=kr^(4) where k is a cosntant. The current density J varies with distance r as J=cr^(n) then the value of n is (where c is another constant).

Consider a long cylindrical wire carrying current along the axis of wire. The current distributed non-uniformly on cross section. The magnetic field B inside the wire varies with distance r from the axis as B=kr^(4) where k is a cosntant. The current density J varies with distance r as J=cr^(n) then the value of n is (where c is another constant).

A long, straight wire of radius R carries a current distributed uniformly over its cross section. The magnitude of the magnetic field is

A cylinderical conductor of radius R is carrying constant current. The plot of the magnitude of the magnetic field, B with the distance, d from the centre of the conductor , is correctly represented by the figure: