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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 10 : The Unijunction Transistor"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 10.1, Page No.249"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# stand off and peak point voltage\n",
+      "\n",
+      "import math\n",
+      "#Variable declaration\n",
+      "Vbb=20                 # in V\n",
+      "eta=0.6                # instrinsic stand off ratio \n",
+      "Vb=0.7                 # in V\n",
+      "\n",
+      "#Calculations\n",
+      "sov=eta*Vbb            # Stand off voltage\n",
+      "Vp=(eta*Vbb)+Vb;\n",
+      "\n",
+      "print(\"(i). Stand off voltage,(V) = %.f \"%sov)\n",
+      "print(\"(ii). Peak point voltage,Vp(V) = %.1f\"%Vp)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "(i). Stand off voltage,(V) = 12 \n",
+        "(ii). Peak point voltage,Vp(V) = 12.7\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 10.2, Page No. 249"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# time period\n",
+      "\n",
+      "import math\n",
+      "#Variable declaration\n",
+      "Vbb=20.0               # in V\n",
+      "C=100.0                # in micro-farad\n",
+      "R=100.0                # in kilo-ohms\n",
+      "Vp=10.0                # in V\n",
+      "\n",
+      "#Calculations\n",
+      "eta=Vp/Vbb                                           # instrinsic stand off ratio \n",
+      "T= ((C*10**-12*R*10**3 *math.log(1/(1-eta))))*10**7  #in micro-seconds\n",
+      "\n",
+      "#Result\n",
+      "print(\"time period of the saw  tooth waveform generated is ,(micro-seconds)= %.2f\"%T)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "time period of the saw  tooth waveform generated is ,(micro-seconds)= 69.31\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 10.3, Page No. 249"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# resistance\n",
+      "\n",
+      "import math\n",
+      "#variable declaration\n",
+      "eta=0.6              # instrinsic stand off ratio \n",
+      "Rbb=10               # interbase resistance in k-ohm\n",
+      "\n",
+      "#Calculations\n",
+      "Rb1=eta*Rbb\n",
+      "Rb2=Rbb-Rb1\n",
+      "\n",
+      "#Result\n",
+      "print(\"Resistance,Rb1(k-ohm) = %.f\"%Rb1)\n",
+      "print(\"Resistance,Rb1(k-ohm) = %.f\"%Rb2)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Resistance,Rb1(k-ohm) = 6\n",
+        "Resistance,Rb1(k-ohm) = 4\n"
+       ]
+      }
+     ],
+     "prompt_number": 7
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file