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+// Exa 3.23

+format('v',5);clc;clear;close;

+// Given data

+I = 100;// in mA

+Im = 1;// in mA

+Rm = 25;// in ohm

+// m = I/Im = 1 + Rm/Rsh;

+Rsh = Rm/((I/Im) - 1);// in ohm

+del_t = 10;// in °C

+Alpha_c = 0.004;

+Alpha_m = 0.00015;

+// When temperature increase by 10 °C

+R_m = Rm * ( 1 + (Alpha_c*del_t) );// in ohm

+R_sh = Rsh * (1 + (Alpha_m*del_t));// in ohm

+// When I= 100 mA then

+I_m = (R_sh/(R_sh+R_m))*I;// in mA

+// But Im required for full scale deflection

+PerEerror= ((I_m-Im)/Im)*100;// in %

+disp("Part (i) ");

+disp(PerEerror,"The percentage error in % is");

+Rx = 75;// in ohm

+Rtotal = Rm+Rx;// in ohm

+Rsh = Rtotal/((I/Im) - 1);// in ohm

+//R_total =R_m+R_x;

+R_total = R_m + (Rx*(1+(Alpha_m*del_t)));// in ohm

+R_sh = Rsh * (1+( Alpha_m*del_t ));// in ohm

+I_m = (R_sh/(R_sh+R_total))*I;// in mA

+PerEerror = ((I_m-Im)/Im)*100;//percentage error in %

+disp("Part (ii) ");

+disp(PerEerror,"The percentage error in % is");