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+//Chapter 2, Example 2.4
+clc
+//Initialisation
+v1=5                 //voltage
+v2=5                 //voltage
+r=10                 //resistance in ohm
+
+
+
+//Calculation
+p1=v1^2/r              //Power in watt when a constant 5 V applied
+p2=v2^2/r              //Power in watt when a sine wave of 5 V r.m.s is applied
+p3=((v1^2)/2)/r        //Power in watt when a sine wave of 5 V peak is applied
+
+//Result
+printf("(a) P = %.1f W\n",p1)
+printf("(b) Pav = %.1f W\n",p2)
+printf("(c) Pav = %.2f W\n",p3)