Which one of the following graphs shows the variation of magnetic induction B which distance r from a long wire carrying a current ?

The graph showing the variation of the magnetic field strength (B) with distance (r) from a long current carrying conductor is.

What is the magnetic induction at a distance of 5 cm from a straight wire carrying a current of 5 mA ?

Show the variation of magnetic field B with perpendicular distance r from the axis of a long conducting cylinder carrying current I.

Which one of the following graphs represents the variation of electric field with distance r from the centre of a charged spherical conductor of radius R?

Calculate the value of magnetic field at a distance of 2 cm from a very long straight wire carrying a current 5 A

The magnetic induction at any point due to a long straight wire carrying a current is

A long straight wire of a circular cross-section (radius a) carries a steady current I and the current I is uniformly distributed across this cross-section. Which of the following plots represents the variation of magnitude of magnetic field B with distance r from the centre of the wire?