1 files changed, 15 insertions, 0 deletions
diff --git a/377/CH12/EX12.5/12_5.sce b/377/CH12/EX12.5/12_5.sce
new file mode 100644
index 000000000..035cd5442
--- /dev/null
+++ b/377/CH12/EX12.5/12_5.sce
@@ -0,0 +1,15 @@
+d=0.026;  //sat d=K*T/q
+Nc=4.7*10^17;
+Nd=2*10^15;
+b=d*log(Nc/Nd);
+printf('\n The value of φn is %fV\n',b);
+e=0.89;  //say e=φb0
+Vbi=e-b;
+printf('\n The value of Vbi is %fV\n',Vbi);
+Vt=0.25;
+Vp=Vbi-Vt;
+printf('\n The value of Vp is %fV\n',Vp);
+q=1.6*10^-19;
+c=13.1*8.854*10^-14;  //say c=Єs
+a=sqrt(Vp*2*c/(q*Nd));
+printf('\n The value of a is %f μm',a*10^4);
+\ No newline at end of file