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//===========================================================================
//chapter 3 example 15
clc;clear all;
//variable decelaration
er = 0.015; //limiting error
V = 100; //range of voltmeter in V
I = 150; //range of ammeter in mA
V1 = 70; //magnitude of voltage being measured in V
I1 = 80; //magnitude of current being measured in mA
//calculations
dV = er*V; //magnitude(dV/V of limiting error of the voltmeter in V
eV = (dV/(V1))*100; //percentage(dI/I) limitng error at this voltage in %
dI = er*I; //magnitude of limitng error off the ammeter in mA
eI = (dI/(I1))*100; //percentage limitng error at this current in %
P = V1*(I1/(1000)); //power in W
dPx = eV+eI; //relative limiting error(dPx/Px) in power measurement in %
//result
mprintf("relative limitng error in power measurement= %3.4f percentage",dPx);
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