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//To find the Time Constant Maximum Current and Time
//Example 38.5
clear;
clc;
L=20*10^-3;//Seld Inductance of Inductor
R=100;//Resistance of the Resistor in ohms
tau=L/R;//Time Constant of L-R circuit
printf("(a) Time Constant =%.2f ms",tau*10^3);
E=10;//EMF of Battery in Volts
I=E/R;//Maximum Current in Amperes
printf("\n (b) Maximum current = %.2f A",I);
iper=0.99;//Current reaches 99% of the Maximum Value
t=tau*-log(1-iper);//Time elapsed befor the current reaches 99% of the maxium value
printf("\n (c) Time elapsed before the current reaches 99 percent of the maximum value = %.2f ms",t*10^3);
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