initial commit / add all books

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diff --git a/3035/CH3/EX3.1/Ex3_1.sce b/3035/CH3/EX3.1/Ex3_1.sce
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+
+// Variable Declaration
+P = 5.0             //Power(MW)
+pf = 0.8            //lagging power factor
+d = 15.0            //Distance of line(km)
+J = 4.0             //Current density(amp per mm^2)
+r = 1.78*10**(-8)   //Resistivity(ohm-m)
+kV_1 = 11.0         //Permissible voltage level(kV)
+kV_2 = 22.0         //Permissible voltage level(kV)
+
+// Calculation Section
+I_1 = (P*10**3)/((3)**(0.5) * (kV_1) * pf)   //Load current(A)
+area_1 = I_1/J                               //Cross-sectional area of the phase conductor(mm^2)
+volume_1 = 3 * (area_1/10**6) * (d*10**3)    //Volume of conductors material(m^3)
+R_1 = r * (d*10**3)/(area_1 * (10**-6))      //Resistance per phase(ohm)
+PL_1 = 3 * (I_1**2) * (R_1*10**(-3))         //Power loss(kW)
+
+I_2 = (P*10**3)/((3)**(0.5) * (kV_2) * pf)   //Load current(A)
+area_2 = I_2/J                               //Cross-sectional area of the phase conductor(mm^2)
+volume_2 = 3 * (area_2/10**6) * (d*10**3)    //Volume of conductors material(m^3)
+R_2 = r * (d*10**3)/(area_2 * (10**-6))      //Resistance per phase(ohm)
+PL_2 = 3 * (I_2**2) * (R_2*10**(-3))         //Power loss(kW)
+area_ch = (area_1-area_2)/area_1*100         //Change in area of 22kV level from 11 kV level(%)
+vol_ch = (volume_1-volume_2)/volume_1*100    //Change in volume of 22kV level from 11 kV level(%)
+loss_ch = (PL_1-PL_2)/PL_1*100               //Change in losses of 22kV level from 11 kV level(%)
+
+// Result Section
+printf('For 11 kV level :')
+printf('Cross-sectional area of the phase conductor = %d mm^2' ,area_1)
+printf('Volume of conductors material = %.2f m^3' ,volume_1)
+printf('Power loss = %.2f kW' ,PL_1)
+printf('\nFor 22 kV level :')
+printf('Cross-sectional area of the phase conductor = %d mm^2' ,area_2)
+printf('Volume of conductors material = %.2f m^3' ,volume_2)
+printf('Power loss = %.2f kW' ,PL_2)
+printf('\nConductor size has decreased by %.f percent in 22 kV level' ,area_ch)
+printf('Conductor volume has decreased by %.f percent in 22 kV level' ,vol_ch)
+printf('Conductor losses has decreased by %.f percent in 22 kV level' ,loss_ch)