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+//===========================================================================
+//chapter 4 example 5
+clc;
+clear all;
+
+
+//variable decelaration
+theta1   = 90;       //deflection in °
+I1          = 10; 
+I2          =5;
+
+//calculations
+//Td  proprtional to I^2
+//Theta   proprtional to I^2
+theta2     = theta1*((I2/(I1))^2);               //deflection for I1 A  spring controlled instrument in  °
+//Tc  proprtional to sin(theta)
+//sin(theta) proprtional to I**2
+
+x   =     (I2/((I1)))
+theta21     = asin(x**2)*(sin(%pi/(2)));    //deflection for I1 A  Gravity  controlled instrument in  °
+theta22  =  (theta21*180)/(%pi);
+
+//result
+mprintf("deflection for I1 A  spring controlled instrument = %3.2f °",theta2);
+mprintf("\ndeflection for I1 A  Gravity  controlled instrument = %3.1f °",theta22);