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+//===========================================================================
+//chapter 4 example 6
+
+clc;
+clear all;
+
+//Variable declaration
+I1      = 10;		//current in A
+theta1  = 60;          //deflection in   °
+theta2  = 40;          //deflection in   °
+
+
+//calculations
+I2     = (I1)*(theta2/(theta1));		//current in case spring controlled ammeter in A
+x      = sin(((theta2*%pi)/(180)));
+y      = sin((theta1*%pi)/(180));
+I21     = (I1)*(x/y);		//current in case gravity controlled ammeter in A
+
+
+//result
+mprintf("current in case spring controlled ammeter = %3.2f A",I2);
+mprintf("\ncurrent in case gravity controlled ammeter = %3.2f A",I21);
+