Current flows through a straight cylindrical conductor of radius r. The current is distributed uniformly over its cross-section. The magnetic field at a distanace x from the axis of the conductor has magnitude B:

Options

A. `B=0` at the axis
B. `Bpropx` for `0lexler`
C. `Bprop1//x` for `xgtr`
D. B is maximum for `x=r`

Answer

A, B, C, D

Explanation

Magnetic field induction at a point inside the cylindrical conductor is `Fpropx`
Magnetic field induction at a point outside the cylindrical conductor is `Fprop1//x`
Magnetic field induction at a point on the axis of cylindrical conductor is zero.
For `x=r`, B is maximum.