The resistivity of a semiconductor can be modified by adding different amounts of impurities. a rod of semiconducting material of length l and cross-sectional area a lies along the x-axis between x=0 and x=l. the material obeys ohm's law, and its resistivity varies along the rod according to ? (x)=? 0exp(? x/l). the end of the rod at x=0 is at a potential v0 greater than the end at x=l. find the total resistance of the rod. express your answer in terms of the given quantities and appropriate constants. r = .632l? 0asubmitmy answersgive upcorrectpart bfind the current in the rod. express your answer in terms of the given quantities and appropriate constants. i = v0a? 0l(1? e? 1)submitmy answersgive upcorrectpart cfind the electric-field magnitude e(x) in the rod as a function of x. express your answer in terms of the given quantities and appropriate constants. e(x) = v0e? xll(1? e? 1)submitmy answersgive upcorrectpart dfind the electric potential v(x) in the rod as a function of x. express your answer in terms of the given quantities and appropriate constants. v(x) = v0e? xl? e? 11? e? 1submitmy answersgive upcorrectpart egraph the function ? (x) for values of x between x=0 and x=l. submitmy answersgive upincorrect; try again; 2 attempts remainingpart fgraph the function e(x) for values of x between x=0 and x=l. submitmy answersgive upincorrect; try again; 4 attempts remainingpart ggraph the function v0(x) for values of x between x=0 and x=l.