An infinitely long conducting cylindrical shell with inner radius $R=0\mathrm{.}02m$ is placed with its axis along the z$-$axis $.$ A cylindrical metal wire with radius $=2\mathrm{.}4{10}^{-5}m$ is

placed along the co$-$axial line. The potential difference between the cylindrical shell and the wire is $V=2\mathrm{.}7{10}^{3}V.$

a$)$ Find the field intensity on the surface of the metal wire.

$E_{\text{w}\text{i}\text{r}\text{e}}=|\frac{,{?}_V}{m}$

b$)$ Find the field intensity on the inner surface of the metal cylindrical tube.

$E_{\text{s}\text{h}\text{e}\text{l}\text{l}}=,\frac{V}{m}$