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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:48e2a30220ca8f0e5ace71d8aaa9abff99fd46fdaaae4dbc00c0c67cefe15ce3"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "CHAPTER 17 - AC COMMUTATOR MOTORS"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E1 - Pg 393"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#Caption:Find (a)Speed (b)Power factor of motor\n",
+      "#Exa:17.1\n",
+      "import math\n",
+      "r=25.#Resistance of motor(in ohms)\n",
+      "P=2.#Number of poles\n",
+      "l=0.4#Inductance of motor(in henry)\n",
+      "n=1800.#Speed of motor(in r.p.m)\n",
+      "V=230.#Voltage supplied(in volts)\n",
+      "Il=1.#Load current(in A)\n",
+      "f=50.#Frequency(in hertz)\n",
+      "fr=(P*n)/120.\n",
+      "Eb=V-(r*Il)\n",
+      "Er=Eb/fr\n",
+      "fac=(math.sqrt((V**2.)-((Il*2.*(math.pi)*f*l)**2.))-(Il*r))/Er\n",
+      "n=fac*(120./P)\n",
+      "print '%s %.f' %('(a)Speed(in rpm)=',n)\n",
+      "pf=math.sqrt((V**2.)-((Il*2.*(math.pi)*f*l)**2.))/V\n",
+      "print '%s %.2f' %('(b)Power factor=',pf)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "(a)Speed(in rpm)= 1472\n",
+        "(b)Power factor= 0.84\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file