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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 12 : Batteries"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example No. 12_1 Page No.  368"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The Resistance ri = 10 Ohms\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Calculate ri if the output of a generator drops from 100 V with zero load current to 80 V when Il is 2 A.\n",
+    "\n",
+    "# Given data\n",
+    "\n",
+    "Vo0 = 100#      # Vo at zero load current=100 Volts\n",
+    "Vo1 = 80#       # Vo at 2 A load current=80 Volts\n",
+    "Il = 2#         # Load current=2 Amps\n",
+    "\n",
+    "Ri = (Vo0-Vo1)/Il#\n",
+    "print 'The Resistance ri = %0.f Ohms'%Ri"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}