p-onsider the cylindrical conductor with a hollow center and copper walls of thickness
b-a
as shown. The radi of the inner and outer walls are
a
and
b
respectively, and the current
I
is uniformly spread over the cross section of the copper (shaded region). What is the magnitude of the magnetic field in units of
nT
at
r=23,3cm
.
a=14,4cm,b=32,4cm,I=158mA
\mu _(0)=4\pi \times 10^(-7)T(m)/(A)
. Provide your answer with two decimal places.