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clc,clear
printf('Example 2.27\n\n')
V=230
N_1=1000,N_2=950
R_a=0.5, R_sh=230 //armature and shunt field resistance
I_L1=10
I_sh = V/R_sh
I_a1 = I_L1 - I_sh
//T (prop.) phi*I_a (prop.) I_a with phi constant and T is constant due to full-load
I_a2=I_a1
E_b1 = V - I_a1*R_a
E_b2=E_b1*(N_2/N_1) //N (prop.) E_b /phi (prop.) E_b as phi is constant
R_x = (V-E_b2)/I_a2 -R_a
printf('Resistance to be inserted in series with armature = %.4f ohms',R_x)
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