//CHAPTER1  EX 1-1   PG NO 17          
L=5*10^-3;   //length
B=2*10^-2;  //breath
A=(5*10^-3)*(2*10^-2);   //area
P=1.72*10^-5 ;  //resistivity of copper
R=P*L/A;   //resistance of copper
disp('i) resistance = '+string (R)+' ohm');
R=P*L/A;              //resistance in ohm