initial commit / add all books

3 files changed, 46 insertions, 0 deletions

diff --git a/3836/CH18/EX18.1/Ex18_1.sce b/3836/CH18/EX18.1/Ex18_1.sce
new file mode 100644
index 000000000..ab85ffd76
--- /dev/null
+++ b/3836/CH18/EX18.1/Ex18_1.sce
@@ -0,0 +1,15 @@
+clear
+//Initialisation
+c=100*10**-6               //capacitance in farad
+r=100*10**3                //resistance in ohm
+v=20                       //volt
+t=25                       //time in seconds
+e=2.71828                  //mathematical constant
+
+//Calculation
+T=c*r                     //time in seconds
+v1=v*(1-e**(-t*T**-1))    //volt
+
+//Result
+printf("\n v = %.2f V",v1)
+
diff --git a/3836/CH18/EX18.2/Ex18_2.sce b/3836/CH18/EX18.2/Ex18_2.sce
new file mode 100644
index 000000000..d3646ac9f
--- /dev/null
+++ b/3836/CH18/EX18.2/Ex18_2.sce
@@ -0,0 +1,19 @@
+clear
+//
+
+//Initialisation
+l=400*10**-3               //inductance in henry
+i1=300                     //current in milliamp
+r=20                       //resistance in ohm
+v=15                       //volt
+t1=25                       //time in seconds
+e=2.71828                  //mathematical constant
+
+//Calculation
+T=l/r                     //time in seconds
+i=(v*r**-1)*10**3         //current in amp
+t2=((log(i/(i-i1)))/(log(e)))*0.02  //expression to find time t
+
+//Result
+printf("\n t = %.1f mSec",t2*10**3)
+
diff --git a/3836/CH18/EX18.3/Ex18_3.sce b/3836/CH18/EX18.3/Ex18_3.sce
new file mode 100644
index 000000000..1fd95f72a
--- /dev/null
+++ b/3836/CH18/EX18.3/Ex18_3.sce
@@ -0,0 +1,12 @@
+clear
+//Initialisation
+c=20*10**-6               //capacitance in farad
+r=10*10**3                //resistance in ohm
+v=5                       //volt
+v2=10                       //volt
+
+//Calculation
+T=c*r                     //time in seconds
+
+//Result
+printf("\n v = %d - %d*e^(-t/%.1f) V",v2,v,T)