Added(A)/Deleted(D) following books

 A  Basic_Engineering_Thermodynamics_by_Rayner_Joel/README.txt
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter1.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter10.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter11.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter12.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter13.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter14.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter2.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter3.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter4.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter5.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter6.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter8.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter9.ipynb
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/screenshots/1.png
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/screenshots/2.png
A  Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/screenshots/3.png
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter2_1.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter3_1.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter4_1.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter6_1.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter7_1.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter8_1.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter9_1.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/screenshots/chapter2_1.png
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/screenshots/chapter3_1.png
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/screenshots/chapter4_1.png
A  Introduction_to_Electrical_Engineering_by_Er._J.P._Navani_&_Er._Sonal_Sapra/README.txt

1 files changed, 242 insertions, 0 deletions

diff --git a/Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter9.ipynb b/Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter9.ipynb
new file mode 100644
index 00000000..8f38e89c
--- /dev/null
+++ b/Engineering_Physics_by_S.L.Gupta,_Sanjeev_Gupta/Chapter9.ipynb
@@ -0,0 +1,242 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# 9: Physics of Semiconductor Devices"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Example number 9.1, Page number 256"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "value of current is 120.73 micro A\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration    \n",
+    "I0=0.3;     #current(micro A)\n",
+    "V=0.15;      #voltage(V)\n",
+    "\n",
+    "#Calculations\n",
+    "I=I0*(math.exp(40*V)-1);      #value of current(micro A)\n",
+    "\n",
+    "#Result\n",
+    "print \"value of current is\",round(I,2),\"micro A\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Example number 9.2, Page number 256"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "reverse saturation current is 5.043 nA\n",
+      "answer in the book is wrong\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration    \n",
+    "I=10*10**-3;     #current(A)\n",
+    "V=0.75;      #voltage(V)\n",
+    "T=300;    #temperature(K)\n",
+    "eta=2;\n",
+    "\n",
+    "#Calculations\n",
+    "VT=T/11600;\n",
+    "I0=I*10**9/(math.exp(V/(eta*VT))-1);      #reverse saturation current(nA)\n",
+    "\n",
+    "#Result\n",
+    "print \"reverse saturation current is\",round(I0,3),\"nA\"\n",
+    "print \"answer in the book is wrong\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Example number 9.3, Page number 256"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "voltage applied is 0.3336 V\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration    \n",
+    "J=10**5;     #current density(amp/m**2)\n",
+    "T=300;    #temperature(K)\n",
+    "eta=1;\n",
+    "J0=250*10**-3;     #saturation current density(A/m**2)\n",
+    "\n",
+    "#Calculations\n",
+    "VT=T/11600;\n",
+    "x=(J/J0)+1;\n",
+    "V=math.log(x)*VT;     #voltage applied(V)\n",
+    "\n",
+    "#Result\n",
+    "print \"voltage applied is\",round(V,4),\"V\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Example number 9.4, Page number 257"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "rectification ratio is 343\n",
+      "answer in the book is wrong\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration    \n",
+    "I0=4*10**-6;     #current(A)\n",
+    "T=273+25;    #temperature(K)\n",
+    "V=0.15;      #voltage(V)\n",
+    "eta=1;\n",
+    "\n",
+    "#Calculations\n",
+    "VT=T/11600;\n",
+    "IF=I0*(math.exp(V/VT)-1);     #forward current(A)\n",
+    "IR=I0*(math.exp(-V/VT)-1);     #reverse current(A)\n",
+    "r=-IF/IR;       #rectification ratio\n",
+    "\n",
+    "#Result\n",
+    "print \"rectification ratio is\",int(r)\n",
+    "print \"answer in the book is wrong\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Example number 9.5, Page number 257"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "voltage applied is -0.06 Volt\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration    \n",
+    "T=300;    #temperature(K)\n",
+    "eta=1;\n",
+    "I0=1;\n",
+    "I=-0.9*I0;     #saturation current density(A/m**2)\n",
+    "\n",
+    "#Calculations\n",
+    "VT=T/11600;\n",
+    "x=(I/I0)+1;\n",
+    "V=math.log(x)*VT;     #voltage applied(V)\n",
+    "\n",
+    "#Result\n",
+    "print \"voltage applied is\",round(V,2),\"Volt\""
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.11"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}