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//===========================================================================
//chapter 6 example 12
clc;clear all;
//variable declaration
Rv = 2400; //resistance in Ω
L =0.6; //instrument inductace in H
f = 60; //frequency in Hz
//calculations
XL = 2*%pi*f*L; //instrument reactance in Ω
Z = sqrt((Rv^2)+(XL^2)); //instrument impedance in Ω
//when the instrument range is extended from 120V to 600V the impedance will have to be made 5 times in order to have the same current
//math.sqrt((RV**2)+XL^2) = 5*Z
x = (5*Z)^2;
y = XL^2;
z = x-y;
a = (sqrt(z));
R = a-Rv; //series resistance in Ω
//result
mprintf("instrument reactance = %3.1f Ω",XL);
mprintf("\nseries resistance = %3.2f Ω",R);
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