//Exa2.17
clc;
clear;
close;
disp("Let the temperature coefficient of resistance of material coil at 0 degree C be alpha0,then");
disp("Resistance at 25 degree C, R1 = R0 * (1+25*alpha0)                (i)");
disp("Resistance at 75 degree C, R2 = R0 * (1+75*alpha0)                (ii)");
disp("Dividing Eq.(ii) by Eq.(i), we get");
disp("R2/R1= (1+75*alpha0)/(1+25*alpha0)");
disp("or  49/45 = (1+75*alpha0)/(1+25*alpha0)");
disp("or alpha0 = 0.00736 ohm/ohm/degree C");