initial commit / add all books

14 files changed, 81 insertions, 0 deletions

diff --git a/620/CH4/EX4.1/example4_1.sce b/620/CH4/EX4.1/example4_1.sce
new file mode 100644
index 000000000..aad6ae195
--- /dev/null
+++ b/620/CH4/EX4.1/example4_1.sce
@@ -0,0 +1,11 @@
+disp("Part a");

+l=100;

+d=2*10^(-3);

+ro=1.72*10^(-8);

+a=%pi*(d^2)/4;

+r=ro*l/a;

+disp("the resistance (in Ω) of copper wire is"); disp(r);

+disp("Part b");

+ro1=2.63*10^(-8);

+r1=r*ro1/ro;

+disp("the resistance (in Ω) of aluminium wire is"); disp(r1);
\ No newline at end of file
diff --git a/620/CH4/EX4.1/example4_1.txt b/620/CH4/EX4.1/example4_1.txt
new file mode 100644
index 000000000..7c1f4dd3c
--- /dev/null
+++ b/620/CH4/EX4.1/example4_1.txt
diff --git a/620/CH4/EX4.2/example4_2.sce b/620/CH4/EX4.2/example4_2.sce
new file mode 100644
index 000000000..52592300b
--- /dev/null
+++ b/620/CH4/EX4.2/example4_2.sce
@@ -0,0 +1,6 @@
+r=10;

+ro=5.5*10^(-8);

+l=3*10^(-2);

+a=ro*l/r;

+d=sqrt(4*a/%pi);

+disp("the diameter (in mm) is"); disp(d*10^3);
\ No newline at end of file
diff --git a/620/CH4/EX4.2/example4_2.txt b/620/CH4/EX4.2/example4_2.txt
new file mode 100644
index 000000000..051cc5439
--- /dev/null
+++ b/620/CH4/EX4.2/example4_2.txt
diff --git a/620/CH4/EX4.3/example4_3.sce b/620/CH4/EX4.3/example4_3.sce
new file mode 100644
index 000000000..38763fb6c
--- /dev/null
+++ b/620/CH4/EX4.3/example4_3.sce
@@ -0,0 +1,12 @@
+disp("Part a");

+d=64.1;

+a=d^2;

+disp("the circular mil area is"); disp(a);

+disp("Part b");

+l=150;

+r1=2.52/1000;

+r=r1*l;

+disp("the resistance value (in Ω) is"); disp(r);

+disp("Part c");

+r2=r/4;

+disp("the resistance (in Ω) of no.8 gauge wire is"); disp(r2);
\ No newline at end of file
diff --git a/620/CH4/EX4.3/example4_3.txt b/620/CH4/EX4.3/example4_3.txt
new file mode 100644
index 000000000..e4f13374d
--- /dev/null
+++ b/620/CH4/EX4.3/example4_3.txt
diff --git a/620/CH4/EX4.4/example4_4.sce b/620/CH4/EX4.4/example4_4.sce
new file mode 100644
index 000000000..cc6455ef6
--- /dev/null
+++ b/620/CH4/EX4.4/example4_4.sce
@@ -0,0 +1,17 @@
+disp("Part a");

+th=0.01*10^(-2);

+bdv=20/10^(-3);

+v=bdv*th;

+disp("the following potential differnce (in V) will puncture the sheet of paper");

+disp(v);

+disp("Part b");

+v1=600;

+bdv1=16*10^3;

+th1=v1/bdv1;

+disp("the minimum thickness (in mm) is"); disp(th1);

+disp("Part c");

+th2=5;

+f=2

+v2=250;

+bdv2=f*v2/th2;

+disp("the minimum breakdown voltage (in kV/mm) required is"); disp(bdv2);
\ No newline at end of file
diff --git a/620/CH4/EX4.4/example4_4.txt b/620/CH4/EX4.4/example4_4.txt
new file mode 100644
index 000000000..690290bab
--- /dev/null
+++ b/620/CH4/EX4.4/example4_4.txt
diff --git a/620/CH4/EX4.5/example4_5.sce b/620/CH4/EX4.5/example4_5.sce
new file mode 100644
index 000000000..0bc0fa542
--- /dev/null
+++ b/620/CH4/EX4.5/example4_5.sce
@@ -0,0 +1,17 @@
+disp("Part a");

+r1=0.511;

+l=10;

+r=r1*l;

+T_C1=20;

+disp("the resistance (in Ω) at 20 °C is"); disp(r);

+disp("Part b");

+T_F2=100;

+T_C2=(T_F2-32)*5/9;

+a_1=0.00393;

+r2=r*(1+a_1*(T_C2-T_C1));

+disp("the resistance (in Ω) at 100 °F is"); disp(r2);

+disp("Part c");

+T_F3=-40;

+T_C3=(T_F3-32)*5/9;

+r3=r*(1+a_1*(T_C3-T_C1));

+disp("the resistance (in Ω) at -40 °F is"); disp(r3);
\ No newline at end of file
diff --git a/620/CH4/EX4.5/example4_5.txt b/620/CH4/EX4.5/example4_5.txt
new file mode 100644
index 000000000..880647b5c
--- /dev/null
+++ b/620/CH4/EX4.5/example4_5.txt
diff --git a/620/CH4/EX4.6/example4_6.sce b/620/CH4/EX4.6/example4_6.sce
new file mode 100644
index 000000000..0ce5c6f03
--- /dev/null
+++ b/620/CH4/EX4.6/example4_6.sce
@@ -0,0 +1,6 @@
+r1=10;

+r2=144;

+a_1=0.0045;

+T1=20;

+T2=(r2/r1-1)/a_1+T1;

+disp("the temperature (in  °C) of the hot filament is"); disp(T2);
\ No newline at end of file
diff --git a/620/CH4/EX4.6/example4_6.txt b/620/CH4/EX4.6/example4_6.txt
new file mode 100644
index 000000000..7504d4fa6
--- /dev/null
+++ b/620/CH4/EX4.6/example4_6.txt
diff --git a/620/CH4/EX4.7/example4_7.sce b/620/CH4/EX4.7/example4_7.sce
new file mode 100644
index 000000000..9bb652975
--- /dev/null
+++ b/620/CH4/EX4.7/example4_7.sce
@@ -0,0 +1,12 @@
+disp("Part a");

+v=120;

+p=60;

+r=18;

+i=v/r;

+disp("the initial inrush of current (in A) is"); disp(i);

+disp("Part b");

+i1=p/v;

+disp("the steady operating current (in A) is"); disp(i1);

+disp("Part c");

+r1=v/i1;

+disp("the hot resistance (in Ω) of the lamp is"); disp(r1);
\ No newline at end of file
diff --git a/620/CH4/EX4.7/example4_7.txt b/620/CH4/EX4.7/example4_7.txt
new file mode 100644
index 000000000..e66afdfd6
--- /dev/null
+++ b/620/CH4/EX4.7/example4_7.txt