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diff --git a/3784/CH4/EX4.6/Ex4_6.sce b/3784/CH4/EX4.6/Ex4_6.sce
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+clc
+//Variable Initialisation
+Ea=500//Input Voltage to armature in volts
+Ra=0.09//Armature resistance in ohm
+If=3//Field Current in Ampere
+K=1.527//Voltage constant
+T=560//Torque Developed in N-m
+N1=0//Speed of Motor in rpm
+d2=1//duty ratio
+//Solution
+Ia=T/(K*If)
+Eb=K*N1
+d1=(Eb+(Ia*Ra))/Ea
+N2=((d2*Ea)-(Ia*Ra))/(K*If)
+N2r=N2*60/(2*%pi)
+d3=[0.2,0.4,0.6,0.8,1.0]
+N3r=[556.56 ,1181.92,1807.28 ,2432.6,3058.0]
+plot(d3,N3r)
+xlabel ('Duty Interval')
+ylabel ('Speed in RPM')