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diff --git a/Engineering_Physics_by_Shyam_Rajeev/Chapter10.ipynb b/Engineering_Physics_by_Shyam_Rajeev/Chapter10.ipynb
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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:32a1f58679b12138480dc1b5e5c18d84b4eee7617fb55dd2b494b13bcfd310c8"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "10: Magnetic properties of materials"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example number 10.1, Page number 247"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#importing modules\n",
+      "import math\n",
+      "from __future__ import division\n",
+      "\n",
+      "#Variable declaration\n",
+      "r = 0.052;         #radius of orbit(nm)\n",
+      "B = 1;           #magnetic field(Wb/m**2)\n",
+      "e = 1.6*10**-19;       #charge of electron(c)\n",
+      "m = 9.1*10**-31;        #mass of electron(kg)\n",
+      "\n",
+      "#Calculation\n",
+      "r = r*10**-9;        #radius of orbit(m)\n",
+      "delta_mew = (e**2)*(r**2)*B/(4*m);       #change in magnetic moment(Am**2)\n",
+      "\n",
+      "#Result\n",
+      "print \"change in magnetic moment is\",round(delta_mew/1e-29,3),\"*10**-29 Am**2\"\n",
+      "print \"answer given in the book is wrong\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "change in magnetic moment is 1.902 *10**-29 Am**2\n",
+        "answer given in the book is wrong\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file