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diff --git a/3760/CH5/EX5.31/Ex5_31.sce b/3760/CH5/EX5.31/Ex5_31.sce
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+clc;
+v=400; // rated voltage of motor
+xd=6; // d-axis synchronous reactance
+xq=4; // q-axis synchronous reactance
+vt=400/sqrt(3); // rated per phase voltage
+// As per the theory given in question, phasor diagram is drawn and formula is derived
+// After the derived expression, for maximum power load angle=45
+de=45;
+P=(vt^2/2)*((1/xq)-(1/xd))*sind(2*de); 
+printf('Maximum load that can be put on synchronous motor is %f W per phase\n',P); 
+printf('Maximum load that can be put on synchronous motor is %f W for 3-phase\n',3*P);
+iq=(vt*sind(de))/xq; // q-axis component of armature current
+id=(vt*sind(de))/xd; // d-axis component of armature current
+ia=sqrt(iq^2+id^2); 
+printf('Armature current is %f A\n',ia);
+pf=(3*P)/(sqrt(3)*v*ia);
+printf('Power factor at maximum power is %f lagging',pf);