The hollow R radius cylindrical tube is infinitely long along the z-axis. The positive charges are evenly distributed over the surface of the tube, and the surface charge density σ. Find electric fields in both regions accordingly.   A) rR for D=arσR/r B) None. C) rR for D=arσR/((\pi\)r) D) rR for D=arπσR/r E) rR for D=0

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6) The hollow R radius cylindrical tube is infinitely long along the z-axis. The positive charges are evenly distributed over the surface of the tube, and the surface charge density σ. Find electric fields in both regions accordingly.
 
A) r<R for D=0; r>R for D=arσR/r
B) None.
C) r<R for D=0; r>R for D=arσR/((\pi\)r)
D) r<R for D=0; r>R for D=arπσR/r
E) r<R for D=0; r>R for D=0
 
this is an electromagnetic wave lesson question.
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