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//===========================================================================
//chapter 8 example 7
clc;clear all;
//variable declaration
V = 230; //voltage in V
I = 4.4; //current in A
T = 3; //time in minutes
x =1; //cos(0)=1
n = 10; //number of revolutions made
M = 200; //meter constant in revolutions per kWh
//calculations
E = (V*I*(T/(60))*x)/(1000); //Energy consumed i3 minutes
E1 = n/(M); //energy consumption registeredin kWh
e = ((E1-E)/(E))*100; //percentage error in %
//result
mprintf("percentage error = %3.3f percentage",e);
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