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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 2: Power Electronics Circuit Layout"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Example 2.9,Page 83"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "load current is 3.75 A\n",
+      "wiring resistance is 26.67 mohm\n",
+      "resistance per inch is 1666.67 microohm/inch\n"
+     ]
+    }
+   ],
+   "source": [
+    "#finding an appropriate wire gauge\n",
+    "\n",
+    "#initialisation of variable\n",
+    "from math import pi,tan,sqrt,sin,cos,acos,atan\n",
+    "V=15.0;#voltage\n",
+    "R=4.0;#resistance\n",
+    "Vl=.1;\n",
+    "D=8.0;#duty cycle\n",
+    "\n",
+    "#calculation\n",
+    "Il=V/R;\n",
+    "Rw=Vl/Il#wiring resistance\n",
+    "Ri=Rw/(2*D);\n",
+    "\n",
+    "#result\n",
+    "print \"load current is\",round(Il,2), \"A\"\n",
+    "print \"wiring resistance is\",round(Rw*1000,2), \"mohm\"\n",
+    "print \"resistance per inch is\",round(Ri*1e6,2), \"microohm/inch\""
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}