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+//CHAPTER 2- STEADY-STATE ANALYSIS OF SINGLE-PHASE A.C. CIRCUIT
+//Example 9
+
+disp("CHAPTER 2");
+disp("EXAMPLE 9");
+
+//VARIABLE INITIALIZATION
+v1=120;                        //voltage of lamp in Volts
+p=100;                         //in Watts
+v2=220;                        //supply voltage in Volts
+f=50;                          //in Hertz
+
+//SOLUTION
+vl=sqrt((v2^2)-(v1^2)); 
+xl=(v1*vl)/p;
+L=xl/(2*%pi*f);
+disp(sprintf("The pure inductance should have a value of %f H",L));
+
+//END