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//===========================================================================
//chapter 10 example 1
clc;
clear all;
//variable declaration
V = 100; //voltmeter reading in V
I =0.005; //ammeter reading in A
S = 1000; //sensitivity of voltmeter in Ω per volt
v = 150; //voltmeter range in V
//calculations
Rv = S*v; //voltmeter resistance in Ω
Rm = V/I; //apparent value of unknown resistor in Ω
y = V/(I*Rv);
x = I*(1-y);
Rx = V/x; //actual value of unknown resistor in Ω
er = ((Rm-Rx)/Rx)*100; //error due to loading effect of voltmeter in %
//result
mprintf("apparent value of unknown resistor = %3.2f Ω",Rm);
mprintf("\nactual value of unknown resistor = %3.2f Ω",Rx);
mprintf("\nerror due to loading effect of voltmeter = %3.2f percentage",er);
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