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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /2459/CH2/EX2.2 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '2459/CH2/EX2.2')
| -rw-r--r-- | 2459/CH2/EX2.2/Ex2_2.PNG | bin | 0 -> 6659 bytes | |||
| -rw-r--r-- | 2459/CH2/EX2.2/Ex2_2.sce | 29 |
2 files changed, 29 insertions, 0 deletions
diff --git a/2459/CH2/EX2.2/Ex2_2.PNG b/2459/CH2/EX2.2/Ex2_2.PNG Binary files differnew file mode 100644 index 000000000..58444171a --- /dev/null +++ b/2459/CH2/EX2.2/Ex2_2.PNG diff --git a/2459/CH2/EX2.2/Ex2_2.sce b/2459/CH2/EX2.2/Ex2_2.sce new file mode 100644 index 000000000..63dae71ae --- /dev/null +++ b/2459/CH2/EX2.2/Ex2_2.sce @@ -0,0 +1,29 @@ +// Chapter 2
+// example 2.2
+// page 29
+Js=0.1 // ampere per square cm
+A=60.2 // ampere per square cm per square kelvin
+T=1900 // kelvin
+
+// Js=A*T^2*exp(-b/T) so b=-T*log(Js/(A*T^2))
+
+b=-T*log(Js/(A*T^2))
+
+// b=11600*phi so making phi as subject
+
+phi=b/11600
+
+printf("work function=%f eV \n",phi)
+// the accurate answer is 3.521466
+// but in the book it is mistakenly written as 3.56
+
+if(2.63<phi & phi<4.52)
+ printf("thoriated tungsten has work function between 2.63eV to 4.52eV.\nSo sample is likely to be thoriated tingsten")
+elseif(phi<=2.63 | phi>4.52)
+ printf("tungsten is contaminated") // for pure tungsten, phi must be 4.52 exactly
+else
+ printf("tungsten is pure") // phi=4.52 implies tungsten is pure
+end
+
+// please note that there is error in the answer of work function phi in the book
+// The correct answer is 3.521466 eV and not 3.56 eV
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