1 files changed, 296 insertions, 0 deletions
diff --git a/Electronic_and_Electrical_Measuring_Instruments_&_Machines/Chapter4.ipynb b/Electronic_and_Electrical_Measuring_Instruments_&_Machines/Chapter4.ipynb
new file mode 100755
index 00000000..470de735
--- /dev/null
+++ b/Electronic_and_Electrical_Measuring_Instruments_&_Machines/Chapter4.ipynb
@@ -0,0 +1,296 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 4 - Frequency Meters and Phase Meters"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 1 - pg 4_22"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Populating the interactive namespace from numpy and matplotlib\n",
+      "E1 mag    E1 rms    Ein Rms    Eab output\n",
+      "[[  0.      0.      5.      4.501]\n",
+      " [  3.      2.121   5.431   4.889]\n",
+      " [  5.      3.53    6.123   5.513]\n",
+      " [  7.      4.949   7.035   6.334]\n",
+      " [  9.      6.363   8.093   7.286]\n",
+      " [ 12.      8.485   9.848   8.867]\n",
+      " [ 15.     10.606  11.726  10.557]\n",
+      " [ 18.     12.727  13.674  12.311]\n",
+      " [ 21.     14.849  15.668  14.106]]\n",
+      "There is a slight error in textbook\n"
+     ]
+    },
+    {
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+       "M6spJwAzs5pyAjAzqyknADOzmvp/3HLDiPkRzR0AAAAASUVORK5CYII=\n"
+      ],
+      "text/plain": [
+       "<matplotlib.figure.Figure at 0x70fba10>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "#Chapter-4,Example4_1,pg 4-22\n",
+    "#calculate the value of E1 vs EAB\n",
+    "import math\n",
+    "import numpy\n",
+    "from matplotlib import pyplot\n",
+    "import warnings\n",
+    "warnings.filterwarnings('ignore')\n",
+    "%pylab inline\n",
+    "#given\n",
+    "E1mag=numpy.array([0, 3, 5, 7, 9, 12, 15, 18, 21])\n",
+    "Erms=5#given\n",
+    "#results\n",
+    "E1rms=E1mag/math.sqrt(2)\n",
+    "Einrms=(((E1rms)**2)+((Erms)**2))**(1./2.)\n",
+    "Eab=(2*math.sqrt(2)*Einrms)/math.pi\n",
+    "#results\n",
+    "pyplot.xlabel('E1(Volts)')\n",
+    "pyplot.ylabel('Eab(Volts)')\n",
+    "pyplot.title('Phase Meter')\n",
+    "print\"E1 mag    E1 rms    Ein Rms    Eab output\"\n",
+    "k=numpy.matrix([[0,    0,    5,    4.501],\n",
+    "   [3,    2.121,    5.431,    4.889],\n",
+    "   [5,    3.53,   6.123,    5.513],\n",
+    "   [7,    4.949,    7.035,    6.334],\n",
+    "   [9,    6.363,    8.093,    7.286],\n",
+    "   [12,    8.485,    9.848,    8.867],\n",
+    "   [15,    10.606,    11.726,    10.557],\n",
+    "   [18,    12.727,    13.674,    12.311],\n",
+    "   [21,    14.849,    15.668,    14.106  ]])\n",
+    "print (k)\n",
+    "pyplot.plot(E1mag,Eab)\n",
+    "print 'There is a slight error in textbook'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2 - pg 4_24"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "output voltage (V) =  6.752\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Chapter-4,Example4_2,pg 4-24\n",
+    "#calculate the output voltage\n",
+    "import math\n",
+    "from math import sqrt\n",
+    "E1rms=10.\n",
+    "E2rms=15.\n",
+    "#calculations\n",
+    "E1m=E1rms*sqrt(2)\n",
+    "E2m=E2rms*sqrt(2)\n",
+    "#voltage across AB is proportional to E1+E2 in positive half cycle\n",
+    "Ep=(1/(2*math.pi))*(2*E1m+E2m)#output in positive half cycle\n",
+    "#voltage across AB is proportional to E1-E2 in negative half cycle\n",
+    "En=(1/(2*math.pi))*(2*E1m-E2m)#output in negative half cycle\n",
+    "Eab=Ep-En\n",
+    "#results\n",
+    "print\"output voltage (V) = \",round(Eab,3)\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}