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diff --git a/Electronic_Devices_by_Thomas_L._Floyd/Chapter11.ipynb b/Electronic_Devices_by_Thomas_L._Floyd/Chapter11.ipynb
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+{
+ "metadata": {
+  "name": "Chapter_11"
+ }, 
+ "nbformat": 2, 
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "<h1>Chapter 11: Thyristors and other Devices<h1>"
+     ]
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "<h3>Example 11.1, Page Number: 353<h3>"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "", 
+      "V_AK=20.0;    #VOLTAGE ACROSS ANODE", 
+      "I_A=1*10**-6;", 
+      "R_AK=V_AK/I_A;", 
+      "print('Resistance = %d * 10^6 Ohm'%(R_AK/10**6))"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "Resistance = 20 * 10^6 Ohm"
+       ]
+      }
+     ], 
+     "prompt_number": 1
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "<h3>Example 11.2, Page Number: 354<h3>"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "", 
+      "R_S=10**3;", 
+      "V_BIAS=110.0;", 
+      "V_BE=0.7;", 
+      "V_CE_sat=0.1;", 
+      "V_A=V_BE+V_CE_sat;    #VOLTAGE ACROSS ANODE", 
+      "V_R_s=V_BIAS-V_A;    #VOLTAGE ACROSS R_S", 
+      "I_A=V_R_s/R_S;", 
+      "print('Anode current = %f A'%I_A)"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "Anode current = 0.109200 A"
+       ]
+      }
+     ], 
+     "prompt_number": 2
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "<h3>Example 11.3, Page Number: 364<h3>"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "", 
+      "n=0.6;", 
+      "V_BB=20.0;", 
+      "V_pn=0.7;", 
+      "V_P=n*V_BB+V_pn;", 
+      "print('peak point emitter voltage = %.1f Volts'%V_P)"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "peak point emitter voltage = 12.7 Volts"
+       ]
+      }
+     ], 
+     "prompt_number": 3
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "<h3>Example 11.4, page Number: 366<h3>"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "", 
+      "V_BB=30.0;", 
+      "V_P=14.0;", 
+      "I_P=20.0*10**-6;", 
+      "V_V=1.0;", 
+      "I_V=10.0*10**-3;", 
+      "x=(V_BB-V_P)/I_P;", 
+      "y=(V_BB-V_V)/I_V;", 
+      "print('R1 should be less than %d Ohms'%x)", 
+      "print('R1 should be more than %d Ohms'%y)"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "R1 should be less than 800000 Ohms", 
+        "R1 should be more than 2900 Ohms"
+       ]
+      }
+     ], 
+     "prompt_number": 4
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "<h3>Example 11.5, Page Number: 376<h3>"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "", 
+      "import math", 
+      "n2=1.3;    #cladding index", 
+      "n1=1.35;    #core index", 
+      "theta=math.acos(n2/n1);", 
+      "t=theta*180/math.pi;", 
+      "print('critical angle in degrees \\n\\t%f'%t)"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "critical angle in degrees ", 
+        "\t15.642471"
+       ]
+      }
+     ], 
+     "prompt_number": 5
+    }
+   ]
+  }
+ ]
+}
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