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+//=========================================================================================
+//chapter 1 example 2
+
+clc;
+clear all;
+
+//variable declarations
+If     = 5;       //full-scale reading of instrument in A
+Ra     = 0.01;    //ammeter resistance in ohm
+
+
+//calculations
+Pf     = ((If)^2)*(Ra);             //power sonsumption for full-scale deflection is W
+n      = (If)/(Pf);             //instrument efficiency in A per watts
+
+//result
+mprintf("power sonsumption for full-scale deflection = %3.2f W",Pf);
+mprintf("\ninstrument efficiency = %3.0f A per watts",n);
+
+
+//================================================================================================