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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:6d073c49f372dda47c7aa22d6e606de390e394a91f8374089b05d9ccb3405267"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 8 - ELECTROSTATIC AND ELECTROMAGNETIC INTERFERENCE WITH COMMUNICATION LINES"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E1 - Pg 203"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#calculate Voltage induced per Km in the line in Volt\n",
+      "import math\n",
+      "#Given data :\n",
+      "f=50.##Hz\n",
+      "hor_con=1.2##horizontal configuration spacing in m\n",
+      "x=0.85##telephone line location below power line in meter\n",
+      "I=120.##current in power line in A\n",
+      "d=0.4##spacing between conductors in meter\n",
+      "dAD=math.sqrt(x**2.+((hor_con+d)/2.)**2.)##m\n",
+      "dAC=math.sqrt(x**2.+((hor_con-d)/2.)**2.)##m\n",
+      "dBD=dAC##m\n",
+      "dBC=dAD##m\n",
+      "M=d*math.log(math.sqrt(dAD*dBC/dAC/dBD))##mh/km\n",
+      "Vm=2*math.pi*f*M*10.**-3*I##V\n",
+      "print '%s %.3f' %(\"Voltage induced per Km in the line in Volt :\",Vm)#\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Voltage induced per Km in the line in Volt : 3.275\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example E2 - Pg 205"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#calculate \n",
+      "import math\n",
+      "#Given data :\n",
+      "f=50.##HzdAP=AO+5##m\n",
+      "l=200.##km\n",
+      "V=132.*1000.##V\n",
+      "Load=28000.##kW\n",
+      "pf=0.85##lagging power factor\n",
+      "r=5./1000.##radius of conductor in m\n",
+      "#From the figure given in question\n",
+      "AO=math.sqrt(4.**2.-2.**2.)##m\n",
+      "dAP=AO+5.##m\n",
+      "dAQ=dAP+1.##m\n",
+      "dBP=math.sqrt(5.**2.+2.**2.)##m\n",
+      "dBQ=math.sqrt(6.**2.+2.**2.)##m\n",
+      "MA=0.2*math.log(dAQ/dAP)##mH/km\n",
+      "MB=0.2*math.log(dBQ/dBP)##mH/km\n",
+      "MC=MB##mH/km\n",
+      "M=MB-MA##mH/km(MA,MB and Mc are print '%s %.2f' %laced by 120 degree)\n",
+      "I=Load*1000./math.sqrt(3.)/V/pf##A\n",
+      "Vm=2.*math.pi*f*M*10.**-3.*I##V/km\n",
+      "Vm1=Vm*l##V(For whole route)\n",
+      "print '%s %.1f' %(\"Induced Voltage(For whole route) in Volts : \",Vm1)#\n",
+      "VA=V/math.sqrt(3.)##V\n",
+      "VB=V/math.sqrt(3.)##V\n",
+      "hA=20.+AO##m\n",
+      "VPA=VA*math.log((2.*hA-dAP)/dAP)/math.log((2.*hA-r)/r)##V\n",
+      "VPB=VB*math.log((2.*hA-dBP)/dBP)/math.log((2.*hA-r)/r)##V\n",
+      "VPC=VPB##V\n",
+      "VP=VPB-VPA##V\n",
+      "print '%s %.f' %(\"Potential of telephone conductor in Volts :\",VP)#\n",
+      "#Answer in the book is wrong due to little accuracy as compared to scilab.\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Induced Voltage(For whole route) in Volts :  88.9\n",
+        "Potential of telephone conductor in Volts : 4409\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file