Under ground, l-length high voltage power cable
the radius a of the conductive wire inside is the radius of
the outer cylindrical lead conductive coating b. Between
conductors
the cylindrical area is filled with silicone-plastic
insulator. Q load uniformly on l conductor wire
It is scattered. (Consider the thicker shape of the television
antenna cable.)
a) Electric field in r <a region and in a region between a
<r <b with the help of Gauss's law,
b) Conductive lead outer cylindrical coating is grounded. In
this case, the capacitance of the cable,
c) The diameter of the inner conductor is 1 cm and the
diameter of the outer conductor is 3 cm. Silicone-plastic insulator
filling between conductors
Considering that the maximum electric field size it can
withstand without deterioration is 2 · 107V / m, in the cable
Find the maximum voltage that can occur.