1 files changed, 26 insertions, 0 deletions
diff --git a/377/CH8/EX8.4/8_4.sce b/377/CH8/EX8.4/8_4.sce
new file mode 100644
index 000000000..207f6bfe1
--- /dev/null
+++ b/377/CH8/EX8.4/8_4.sce
@@ -0,0 +1,26 @@
+disp("σ=e*n*μe+e*p*μh=e*ni*(μe+μh)");
+b=1350;  //say b=μe
+c=450;  //say c=μh
+e=1.6*10^-19;
+ni=1.45*10^10;
+a=e*ni*(b+c);
+printf('\n The value of σ is %1.2f*10^-6',a*10^6);
+L=1;A=1;
+g=4.18*10^-6;  //rounding off σ
+R=L/(g*A);
+printf('\n The value of R is %f',R);
+Nsi=5*10^22;
+Nd=Nsi/10^9;
+n=5*10^13;
+h=5*10^13;
+printf('\n The value of Nd is %f',Nd);
+p=(ni^2)/Nd;
+printf('\n Tha value of p is %f',p);
+a1=e*n*b;  //say σ=a1
+printf('\n The value of σ1 is %f/ohm/cm',a1);
+R1=L/(a1*A);
+printf('\n The value of R1 is %f ohm',R1);
+a2=e*h*c;  //say a2=σ
+printf('\n The value of σ2 is %f/ohm/cm',a1);
+R2=L/(a2*A);
+printf('\n The value of R2 is %f ohm',R2);
+\ No newline at end of file