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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:5dfcc3b8a36b2e69e76da78cbe3cbbcd618d029b3ed8c322ee0560bc514169c3"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter9:DIELECTRIC PROPERTIESOF MATERIALS"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex9.1:pg-269"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#to calculate dielectric constant of the liquid\n",
+      "#capacitance of the air filled dielectric Cair=Q/Vo-----------eq(1)\n",
+      "#when dielectric is filled between the plates ,Cliquid=Q/V\n",
+      "#then Cliquid=epsilonr*Q/Vo------eq(2)\n",
+      "Vo=60\n",
+      "                  #voltage in volts\n",
+      "V=30\n",
+      "#from eq(1) and eq(2),we get\n",
+      "epsilon0=Vo/V\n",
+      "print \"the dielectric constant of the liquid is epsilon0=\",epsilon0,\"unitless\"\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "the dielectric constant of the liquid is epsilon0= 2 unitless\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex9.2:pg-269"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#to calculate charge on the capacitance\n",
+      "epsilon0=8.854*10**-12 #permittivity\n",
+      "epsilonr=6 #relative permittivity\n",
+      "V=100 #voltage in volts\n",
+      "d=1.5*10**-3 #distance in m\n",
+      "A=4*10**-4#area in m**2\n",
+      "Q=epsilon0*epsilonr*A*V/d\n",
+      "print \"the charge on the capacitance is Q=\",\"{:.2e}\".format(Q),\"Coulomb\"\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "the charge on the capacitance is Q= 1.42e-09 Coulomb\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex9.3:pg-269"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#to calculate voltage\n",
+      "A=6.50*10**-4 #area in m**2\n",
+      "Q=2*10**-10 #charge in C\n",
+      "d=4*10**-3 #plate separation in m\n",
+      "epsilon0=8.854*10**-12\n",
+      "epsilonr=3.5 #dielectric constant\n",
+      "V=Q*d/(epsilon0*epsilonr*A)\n",
+      "print \"the resultant voltage across the capacitor is V=\",round(V,1),\"volt\"\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "the resultant voltage across the capacitor is V= 39.7 volt\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file