initial commit / add all books

1 files changed, 23 insertions, 0 deletions

diff --git a/620/CH18/EX18.4/example18_4.sce b/620/CH18/EX18.4/example18_4.sce
new file mode 100644
index 000000000..2f11f4931
--- /dev/null
+++ b/620/CH18/EX18.4/example18_4.sce
@@ -0,0 +1,23 @@
+v=20;

+r1=125;

+r2=4;

+disp("Part a");

+n=sqrt(r1/r2);

+disp("the required turns ratio is"); disp(n);

+disp("Part b");

+v1=v/2;

+i1=v1/r1;

+disp("the primary input voltage (in V) is"); disp(v1);

+disp("the primary current (in mA) is"); disp(i1*10^3);

+disp("Part c");

+v2=v1/n;

+i2=n*i1;

+disp("the secondary output voltage (in V) is"); disp(v2);

+disp("the secondary current (in mA) is"); disp(i2);

+disp("Part d");

+p=i2^2*r2;

+disp("the output power transferred (in W) is"); disp(p);

+disp("Part e");

+i=v/(r1+r2);

+p1=i^2*r2;

+disp("the power transferred (in W) to the loudspeaker is"); disp(p1);
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