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+//CHAPTER 4- MEASURING INSTRUMENTS
+//Example 5
+
+disp("CHAPTER 4");
+disp("EXAMPLE 5");
+
+//VARIABLE INITIALIZATION
+m_c=100;                  //meter constant in rev/kWh
+I=20;                     //in Amperes
+v=230;                    //in Volts
+pow_fact=0.8;
+rev_act=360;              //actual revolution
+
+//SOLUTION
+E=(v*I*pow_fact)/1000;    //from Wh to kWh
+rev=m_c*E;                //number of revolutions for true energy
+disp(sprintf("The number of revolutions made by the meter is %f",rev));
+err=(rev_act-rev)/rev;
+err=err*100;              //percentage error
+disp(sprintf("The percentage error is %f %%",err));
+if(err<0) then
+disp("The negative sign indicates that the meter will run slow");
+end
+
+//END
+