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+// Example 1.48
+
+clear; clc; close;
+
+format('v',6);
+// Given data
+P=16;//no. of poles
+PM=4;//no. of poles of modulating function
+n=1;//assumed
+r=4;//assumed
+f=50;//in Hz
+
+//Calculations
+check=n/r==1/3*(1-PM/P);
+if check then
+    disp("Equation is satisfied with -ve sign.");
+    P2=P+PM;
+    
+end
+check=n/r==1/3*(1+PM/P);
+if check then
+    disp("Equation is satisfied with +ve sign.")
+    P2=P-PM;
+end
+Ns1=120*f/P;//in rpm
+Ns2=120*f/P2;//in rpm
+disp(Ns2,Ns1,"Two speeds(in rpm) are : ");