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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:29de63e7ef1a8622d7d2e459bd1b9274805adbb7b74a608deb83d9b4c0dd3ef4"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Chapter22-Superconductivity"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex1-pg646"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import math\n",
-      "##Example 22.1\n",
-      "##calculation of magnetic field\n",
-      "\n",
-      "##given values\n",
-      "\n",
-      "Tc=7.2;##transition temp in K\n",
-      "T=5.;##temp in K\n",
-      "Hc=3.3*10**4;##magnetic field at T in A/m\n",
-      "\n",
-      "\n",
-      "##calculation\n",
-      "Hc0=Hc/(1-(T**2/Tc**2));\n",
-      "print'%s %.2f %s'%('max value of H at 0K (in A/m) is ',Hc0,'');\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "max value of H at 0K (in A/m) is  63737.70 \n"
-       ]
-      }
-     ],
-     "prompt_number": 1
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex2-pg646"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import math\n",
-      "##Example 22.2\n",
-      "##calculation of transition temperature\n",
-      "\n",
-      "##given values\n",
-      "\n",
-      "T=8.;##temp in K\n",
-      "Hc=1*10**5.;##critical magnetic field at T in A/m\n",
-      "Hc0=2*10**5.;##magnetic field at 0 K in A/m\n",
-      "\n",
-      "##calculation\n",
-      "Tc=T/(math.sqrt(1.-Hc/Hc0));\n",
-      "print'%s %.2f %s'%('transition temp in K is',Tc,'');\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "transition temp in K is 11.31 \n"
-       ]
-      }
-     ],
-     "prompt_number": 3
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex3-pg647"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import math\n",
-      "##Example 22.3\n",
-      "##calculation of temp at which there is  max critical field\n",
-      "\n",
-      "##given values\n",
-      "\n",
-      "Tc=7.26;##critical temp in K\n",
-      "Hc=8*10**5.;##max critical magnetic field at T in A/m\n",
-      "H=4*10**4.;## subjected magnetic field at in A/m\n",
-      "\n",
-      "##calculation\n",
-      "T=Tc*(math.sqrt(1.-H/Hc));\n",
-      "print'%s %.2f %s'%('max temp for superconductivity in K is',T,'');\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "max temp for superconductivity in K is 7.08 \n"
-       ]
-      }
-     ],
-     "prompt_number": 4
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file