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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 /2825/CH2/EX2.7 | |
| 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 '2825/CH2/EX2.7')
| -rwxr-xr-x | 2825/CH2/EX2.7/Ex2_7.sce | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/2825/CH2/EX2.7/Ex2_7.sce b/2825/CH2/EX2.7/Ex2_7.sce new file mode 100755 index 000000000..d435aa62a --- /dev/null +++ b/2825/CH2/EX2.7/Ex2_7.sce @@ -0,0 +1,17 @@ +//Ex2_7 Pg-88
+clc
+disp("Relaxation time in terms of mobility is given by")
+disp(" t=m*u/e")
+printf("\n\n Taking effective mass of electron an holes in consideration,\n relaxation time is given by \n")
+disp(" t=m_star*u/e")
+disp("(a) foe electrons,m_star = 0.259*m_0")
+m0=9.1*10^(-31)
+ue=0.135 //mobility of electrons
+e=1.6*10^(-19) //electron charge
+t_e=(0.259*m0*ue)/e
+printf("\n Average relaxation time of eletrons = %.2f*1e-13 secs\n ",t_e*1e13)
+
+uh=0.048 //mobility of holes
+disp("(b) For holes in the valance band,m=0.537*m_0")
+t_h=(0.537*m0*uh)/e
+printf("\n Average relaxation time of eletrons = %.2f*1e-13 secs\n ",t_h*1e13)
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