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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1730/CH3/EX3.9 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '1730/CH3/EX3.9')
| -rwxr-xr-x | 1730/CH3/EX3.9/Exa3_9.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/1730/CH3/EX3.9/Exa3_9.sce b/1730/CH3/EX3.9/Exa3_9.sce new file mode 100755 index 000000000..8e7c8f67c --- /dev/null +++ b/1730/CH3/EX3.9/Exa3_9.sce @@ -0,0 +1,21 @@ +//Exa3.9
+clc;
+clear;
+close;
+// given data
+n_i=2.5*10^13;// in /m^3
+miu_e=3800;// in cm^2/V-s
+miu_h=1800;// in cm^2/V-s
+e=1.6*10^-19;// in C (charge of electrons)
+sigma_i=n_i*e*(miu_e+miu_h);
+disp("Intrinsic conductivity is : "+string(sigma_i)+" /ohm-cm");
+// Let Number of germanium atoms/cm^3 = no_g
+no_g=4.41*10^22;
+// since Donor impurity = 1 donor atom / 10^7 germanium atoms, so
+DonorImpurity=10^-7;
+N_D=no_g*DonorImpurity;
+n=N_D; // (approx)
+p=n_i^2/N_D;
+// so
+sigma_n=e*N_D*miu_e;
+disp("conductivity in N-type germanium semiconductor is : "+string(sigma_n)+" /ohm-cm");
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