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diff --git a/Electrical_and_Electronic_Systems_by_Neil_Storey/Chapter23.ipynb b/Electrical_and_Electronic_Systems_by_Neil_Storey/Chapter23.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 23: Electric Motors and Generators"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 23.1, Page 483"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Sinusoidal Voltage with Peak value = 8.4 V\n"
+     ]
+    }
+   ],
+   "source": [
+    "#initialization\n",
+    "n=100                   #no of turns\n",
+    "b=400*10**-3            #magnetic field\n",
+    "a=20*10**-4             #area in cm^2\n",
+    "w=105                    #angular frequency\n",
+    "\n",
+    "#calculation\n",
+    "v=n*b*a*w                 #voltage\n",
+    "\n",
+    "#result\n",
+    "print'Sinusoidal Voltage with Peak value = %.1f V'%v"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 23.2, Page 488"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Rotation Speed = 1800 rpm\n"
+     ]
+    }
+   ],
+   "source": [
+    "#initialization\n",
+    "f=60                    #frequency in Hz\n",
+    "a=60                    #seconds\n",
+    "\n",
+    "#calculation\n",
+    "f1=f/2                  #required rotation speed\n",
+    "f2=f1*a                  #equivalent rotation speed\n",
+    "\n",
+    "\n",
+    "#result\n",
+    "print'Rotation Speed = %d rpm'%f2"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 23.3, Page 490"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Rotation Speed = 12000 rpm\n"
+     ]
+    }
+   ],
+   "source": [
+    "#initialization\n",
+    "f=50                    #frequency in Hz\n",
+    "p=4                     #four times magnetic field for 8 pole motor\n",
+    "a=60                    #seconds\n",
+    "\n",
+    "#calculation\n",
+    "f1=f*p                   #required rotation speed\n",
+    "f2=f1*a                  #equivalent rotation speed\n",
+    "\n",
+    "\n",
+    "#result\n",
+    "print'Rotation Speed = %d rpm'%f2"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "anaconda-cloud": {},
+  "kernelspec": {
+   "display_name": "Python [Root]",
+   "language": "python",
+   "name": "Python [Root]"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.12"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}