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   "source": [
    "# Chapter 21: Elecromagnetics"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Ex21.1:pg-1037"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
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   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The Wavelength of the Electromagnetic wave is lamda= 294.0  meters\n"
     ]
    }
   ],
   "source": [
    "  #Example 21_1\n",
    " \n",
    "  \n",
    "  #To find the wavelength of the electromagnetic wave\n",
    "v=3*10.0**8        #Units in meters/sec\n",
    "f=1.02*10**6         #Units in Hz\n",
    "lamda=v/f     #Units in Meters\n",
    "print \"The Wavelength of the Electromagnetic wave is lamda=\",round(lamda),\" meters\"\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Ex21.2:pg-1038"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The value of the magnetic field is Bo=\n",
      "1.4e-11\n",
      "T\n"
     ]
    }
   ],
   "source": [
    "  #Example 21_2\n",
    " \n",
    "  \n",
    "  #To find the value of magnetic field\n",
    "eo=4.2*10**-3     #units in V/m\n",
    "c=3*10**8            #Units in meters/sec\n",
    "bo=eo/c         #Units in T\n",
    "print \"The value of the magnetic field is Bo=\"\n",
    "print bo\n",
    "print \"T\"\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Ex21.3:pg-1039"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The value of Eo= 0.02448  N/C\n",
      " The value of Bo= 8.16124749653e-11\n",
      "T\n"
     ]
    }
   ],
   "source": [
    "  #Example 21_3\n",
    "import math \n",
    "  #To find the values of Eo and Bo in the wave\n",
    "power=1000         #Units in W\n",
    "r=10000         #units in meters\n",
    "area=4*math.pi*r**2        #units in meter**2\n",
    "P_a=power/area          #unts in W/meter**2\n",
    "c=3*10**8         #units in meters/sec\n",
    "eeo=8.85*10**-12       #units in C**2/N*meter**2\",round( ,5),\" \n",
    "eo=math.sqrt((2*P_a)/(c*eeo))             #units in N/C\n",
    "bo=eo/c          #Units in T\n",
    "print \"The value of Eo=\",round(eo,5),\" N/C\\n The value of Bo=\",\n",
    "print bo\n",
    "print \"T\"\n"
   ]
  }
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