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//Chapter 18, Problem 11
clc;
//initializing the variables:
R = 15; //resistance in ohms
V = 110; //supply voltage
taw = 2; //time constant
t1 = 3; // in secs
i2 =5; // in amperes
//calculation:
L = taw*R
t = 0:0.1:10
I = V/R
i = I*(%e^(-1*t/taw))
plot2d(t,i)
xtitle("current/time characteristic", "t", "i")
i1 = I*(%e^(-1*t1/taw))
t2 = -1*taw*log((i2/I))
printf("\n Inductance is %.0f H\n\n",L)
printf("\n (a)The current flowing in the winding 3 s after being shorted-out = %.2f A\n\n",i1)
printf("\n (b)The time for the current to decay to 5 A = %.3f sec\n\n",t2)
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