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//=====================================================================================
//Chapter 12 example 16
clc;clear all;
//variable decalaration
R4 = 1000; //resistance in Ω
C3 = 50*10^-12; //capacitance in F
A = 314*10^-4; //area in m**2
D = 0.3*10^-2; //thickness in m
er = 2.3; //dielectric constant
e0 = 8.854*10^-12; //dielectric constant
d = 9; //loss angle in °
f = 50;
theta = 9;
//calculations
C1 = (er*e0*A)/D; //capacitance in F
tand = tan(9*%pi/180);
cosd = cos(9*%pi/180);
w = 2*%pi*f;
R1 = 1/(w*C1*tand); //resistance in Ω
C4 = 1/((w^2)*C1*R1*R4); //variable capacitor in F
R2 = (C3*R4*(cosd^2))/(C1); //variable resistance in Ω
//result
mprintf("Variable capacitor = %3.2f uF",(C4*10^6));
mprintf("\nvariable resistance = %3.3f Ω",cosd);
mprintf("\nNote:Answer in textbooks is taken tha approximate values")
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