The correct plot of the magnitude of magnetic field `vecB` vs distance r from centre of the wire is, if the radius of wire is R

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:

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:

A long straight wire of radius R carries a steady current which is uniformly distributed through the cross-section of the wire. The magnitudes of the magnetic field at distance r_(1) and r_(2) from the centre of the wire are B_(1) and B_(2) respectively. Then

A sphere of radius R carries charge such that its volume charge density is proportional to the square of the distance from the centre. What is the ratio of the magnitude of the electric field at a distance 2 R from the centre to the magnitude of the electric field at a distance of R//2 from the centre?

A sphere of radius R carries charge such that its volume charge density is proportional to the square of the distance from the centre. What is the ratio of the magnitude of the electric field at a distance 2 R from the centre to the magnitude of the electric field at a distance of R//2 from the centre?

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 .