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diff --git a/sample_notebooks/Preeti/Chapter15.ipynb b/sample_notebooks/Preeti/Chapter15.ipynb new file mode 100644 index 00000000..30a222a9 --- /dev/null +++ b/sample_notebooks/Preeti/Chapter15.ipynb @@ -0,0 +1,354 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 15 : Alternating voltage & current" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_1 Page No: 546" + ] + }, + { + "cell_type": "code", + "execution_count": 24, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Voltage at 30° = 50.00 Volts\n", + "The Voltage at 45° = 70.71 Volts\n", + "The Voltage at 90° = 100.00 Volts\n", + "The Voltage at 270° = -100.00 Volts\n" + ] + } + ], + "source": [ + "from numpy import sin, pi\n", + "# A sine wave of voltage varies from zero to a maximum of 100 V. How much is the voltage at the instant of 30° of the cycle? 45°? 90°? 270°?\n", + "\n", + "# Given data\n", + "\n", + "Vm = 100# # Vm=100 Volts\n", + "t1 = 30# # Theta 1=30°.\n", + "t2 = 45# # Theta 2=45°.\n", + "t3 = 90# # Theta 3=90°.\n", + "t4 = 270# # Theta 4=270°.\n", + "\n", + "v1 = Vm*sin(t1*pi/180)\n", + "print 'The Voltage at 30° = %0.2f Volts'%v1\n", + "\n", + "v2 = Vm*sin(t2*pi/180)\n", + "print 'The Voltage at 45° = %0.2f Volts'%v2\n", + "\n", + "v3 = Vm*sin(t3*pi/180)\n", + "print 'The Voltage at 90° = %0.2f Volts'%v3\n", + "\n", + "v4 = Vm*sin(t4*pi/180)\n", + "print 'The Voltage at 270° = %0.2f Volts'%v4" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_2 Page No: 548" + ] + }, + { + "cell_type": "code", + "execution_count": 25, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Time period = 1e-03 Seconds\n", + "i.e 1/1000 sec\n", + "The Frequency = 1000.00 Hertz\n", + "OR 1 kHz\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "# An alternating current varies through one complete cycle in 1 ⁄ 1000 s. Calculate the period and frequency.\n", + "\n", + "# Given data\n", + "\n", + "tc = 1/1000# # One Complete Cycle=1 ⁄ 1000 sec.\n", + "\n", + "T = tc#\n", + "print 'The Time period = %0.e Seconds'%T\n", + "print 'i.e 1/1000 sec'\n", + "\n", + "f = 1/tc#\n", + "print 'The Frequency = %0.2f Hertz'%f\n", + "print 'OR 1 kHz'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_3 Page No: 549" + ] + }, + { + "cell_type": "code", + "execution_count": 26, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Time period = 1e-06 Seconds of 1 MHz freq.\n", + "i.e 1*10**-6 sec = 1 usec\n", + "The Time period = 5e-07 Seconds of 2 MHz freq.\n", + "i.e 0.5*10**-6 sec = 0.5 usec\n" + ] + } + ], + "source": [ + "# Calculate the period for the two frequencies of 1 MHz and 2 MHz.Calculate the period for the two frequencies of 1 MHz and 2 MHz.\n", + "\n", + "# Given data\n", + "\n", + "f1 = 1*10**6# # Freq=1 MHz\n", + "f2 = 2*10**6# # Freq=2 MHz\n", + "\n", + "t1 = 1/f1#\n", + "print 'The Time period = %0.e Seconds of 1 MHz freq.'%t1\n", + "print 'i.e 1*10**-6 sec = 1 usec'\n", + "\n", + "t2 = 1/f2#\n", + "print 'The Time period = %0.e Seconds of 2 MHz freq.'%t2\n", + "print 'i.e 0.5*10**-6 sec = 0.5 usec'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_4 Page No: 549" + ] + }, + { + "cell_type": "code", + "execution_count": 27, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Lamda or Wavelenght = 1.00 cm\n" + ] + } + ], + "source": [ + "# Calculate lamda for a radio wave witf f of 30 GHz.\n", + "\n", + "# Given data\n", + "\n", + "c = 3*10**10# # Speed of light=3*10**10 cm/s\n", + "f = 30*10**9# # Freq=30 GHz\n", + "\n", + "l = c/f#\n", + "print 'The Lamda or Wavelenght = %0.2f cm'%l" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_5 Page No: 550" + ] + }, + { + "cell_type": "code", + "execution_count": 28, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Height = 250.00 cm\n", + "The Height = 8.20 feet\n" + ] + } + ], + "source": [ + "# The length of a TV antenna is lamda\u0005/2 for radio waves with f of 60 MHz. What is the antenna length in centimeters and feet?\n", + "\n", + "# Given data\n", + "\n", + "c = 3*10**10# # Speed of light=3*10**10 cm/s\n", + "f = 60*10**6# # Freq=60 MHz\n", + "In = 2.54# # 2.54 cm = 1 in\n", + "ft = 12# # 12 in = 1 ft\n", + "\n", + "l1 = c/f#\n", + "l = l1/2#\n", + "print 'The Height = %0.2f cm'%l\n", + "\n", + "li = l/In\n", + "lf = li/ft#\n", + "print 'The Height = %0.2f feet'%lf" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_6 Page No: 550" + ] + }, + { + "cell_type": "code", + "execution_count": 29, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Frequency = 50000000 Hertz\n", + "i.e 50*10**6 Hz OR 50 MHz\n" + ] + } + ], + "source": [ + "# For the 6-m band used in amateur radio, what is the corresponding frequency?\n", + "\n", + "# Given data\n", + "\n", + "v = 3*10**10# # Speed of light=3*10**10 cm/s\n", + "l = 6*10**2# # lamda=6 meter\n", + "\n", + "f = v/l\n", + "print 'The Frequency = %0.f Hertz'%f\n", + "print 'i.e 50*10**6 Hz OR 50 MHz'" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_7 Page No: 551" + ] + }, + { + "cell_type": "code", + "execution_count": 30, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Lamda or Wavelenght = 11.30 ft\n" + ] + } + ], + "source": [ + "# What is the wavelength of the sound waves produced by a loudspeaker at a frequency of 100 Hz?\n", + "\n", + "# Given data\n", + "\n", + "c = 1130# # Speed of light=1130 ft/s\n", + "f = 100# # Freq=100 Hz\n", + "\n", + "l = c/f#\n", + "print 'The Lamda or Wavelenght = %0.2f ft'%l" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example No. 15_8 Page No: 552" + ] + }, + { + "cell_type": "code", + "execution_count": 31, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The Lamda or Wavelength = 0.03 ft\n", + "The Lamda or Wavelength = 1.00 cm\n" + ] + } + ], + "source": [ + "# For ultrasonic waves at a frequency of 34.44 kHz, calculate the wavelength in feet and in centimeters.\n", + "\n", + "# Given data\n", + "\n", + "c = 1130# # Speed of light=1130 ft/s\n", + "f = 34.44*10**3# # Freq=100 Hz\n", + "In = 2.54# # 2.54 cm = 1 in\n", + "ft = 12# # 12 in = 1 ft\n", + "\n", + "l = c/f#\n", + "print 'The Lamda or Wavelength = %0.2f ft'%l\n", + "\n", + "a = l*ft#\n", + "\n", + "l1 = a*In#\n", + "print 'The Lamda or Wavelength = %0.2f cm'%l1" + ] + } + ], + "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 +} |