Question #134768

Consider a coaxial cable formed by two concentric cylindrical conductors with the radius of the inner conductor being “a” and the outer conductor being “b”. Let L be the length of the cable. Assume the surface charge distribution on the inner conductor be defined by ρs. Determine the flux density D at a point ρ located radially between a and b, i.e. a < ρ < b.

Expert's answer

---------------- 1

from gauss law,

Change Q at point P located is

------------ 2

from equation 1 and 2

(a<P<b)

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