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//===============================================================================
//Chapter 12 Example 9
clc;clear all;
//variable declaration
R2 = 1000; //resistance of arm in Ω
R3 = 1000; //resistance of arm in Ω
R1 = 500; //resistance of arm in Ω
L1 = 0.18; //inductance in H
//calculations
f = 5000/(2*(%pi)); //frequency in Hz
w = 2*(%pi)*f;
x = R1/((w^2)*L1); //R4*C4 be x
z = ((w^2)*(x^2));
a = (1+z);
C4 = (L1*a)/(R2*R3);
//from 1 and 2 equations
//R4 = R4*C4/C4 = x/C4
R4 = (x)/(C4); //resistance in Ω
//result
mprintf("resistance = %3.2f Ω",R4);
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