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+{
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# Chapter 20: Alternating Currents and Electronics"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Ex20.1:pg-982"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 1,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "We have to wait for a time of t= 10.0 sec\n"
+ ]
+ }
+ ],
+ "source": [
+ " #Example 20_1\n",
+ " \n",
+ " \n",
+ "#To findout the time that it has to wait after turning off the set before it is safe to touch capacitor\n",
+ "r=10.0**6 #Units in Ohms\n",
+ "c=10.0**-5 #Units in F\n",
+ "ti=r*c #Units in Sec\n",
+ "print \"We have to wait for a time of t=\",round(ti),\" sec\"\n"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Ex20.2:pg-983"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 2,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "The RMS current when f=20 Hz is= 0.00402 Ohms\n",
+ "The RMS current when f=2*10**6 Hz is= 402.12 Ohms\n"
+ ]
+ }
+ ],
+ "source": [
+ " #Example 20_2\n",
+ "\n",
+ "import math\n",
+ " \n",
+ "#To find the rms current in the circuit \n",
+ "f=20 #Units in Hz\n",
+ "c=4*10.0**-7 #Units in F\n",
+ "xc=1/(2.0*math.pi*f*c) #Units in Ohms/sec\n",
+ "f=2*10**6 #Units in Hz\n",
+ "xc1=1/(2*math.pi*f*c) #Units in Ohms/sec\n",
+ "v=80.0 #Units in V\n",
+ "i=v/xc #Units in A\n",
+ "i1=v/xc1 #Units in A\n",
+ "print \"The RMS current when f=20 Hz is=\",round(i,5),\" Ohms\\nThe RMS current when f=2*10**6 Hz is=\",round(i1,2),\" Ohms\"\n"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Ex20.3:pg-984"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 3,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "The current in the inductor when frequency=60 Hz is I= 7.07 A\n",
+ "\n",
+ "The current in the inductor when frequency=6*10**2 Hz is I= 0.000707 A\n"
+ ]
+ }
+ ],
+ "source": [
+ " #Example 20_3\n",
+ " \n",
+ " \n",
+ "#To find the current through the inductor\n",
+ "f=60 #Units in Hz\n",
+ "l=15.0*10**-3 #Units in H\n",
+ "xl=2*math.pi*f*l #Units in Ohms\n",
+ "v=40 #Units in V\n",
+ "i=v/xl #Units in A\n",
+ "print \"The current in the inductor when frequency=60 Hz is I=\",round(i,2),\" A\"\n",
+ "f=6.0*10**5 #Units in Hz\n",
+ "l=15.0*10**-3 #Units in H\n",
+ "xl=2*math.pi*f*l #Units in Ohms\n",
+ "v=40 #Units in V\n",
+ "i=v/xl #Units in A\n",
+ "print \"\\nThe current in the inductor when frequency=6*10**2 Hz is I=\",round(i,6),\" A\"\n"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Ex20.4:pg-984"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 4,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "ename": "SyntaxError",
+ "evalue": "invalid syntax (<ipython-input-4-42e5d01775ba>, line 15)",
+ "output_type": "error",
+ "traceback": [
+ "\u001b[1;36m File \u001b[1;32m\"<ipython-input-4-42e5d01775ba>\"\u001b[1;36m, line \u001b[1;32m15\u001b[0m\n\u001b[1;33m print \"The current in circuit is I=\",round( ,4),\" A\\nVolt meter readings across resistor Vr=\",round( ,1),\" V\\nReadings across capacitor is Vc=\",round( ,1),\" V\\nPower loss in circuit is=\",round( ,1),\" W\",i,vr,vc,p)\u001b[0m\n\u001b[1;37m ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
+ ]
+ }
+ ],
+ "source": [
+ " #Example 20_4\n",
+ " \n",
+ " \n",
+ "#To find current in circuit, Voltmeter reading, reading across capacitor and power loss\n",
+ "f=2000 #Units in Hz\n",
+ "c=0.6*10**-6 #Units in F\n",
+ "xc=1/(2*math.pi*f*c) #Units in Ohms\n",
+ "r=300 #Units in Ohms\n",
+ "z=sqrt(r**2+xc**2) #Units in Ohms\n",
+ "v=80 #Units in V\n",
+ "i=v/z #Units in A\n",
+ "vr=i*r #Units in V\n",
+ "vc=i*xc #Units in V\n",
+ "p=i**2*r #Units in W\n",
+ "print \"The current in circuit is I=\",round( ,4),\" A\\nVolt meter readings across resistor Vr=\",round( ,1),\" V\\nReadings across capacitor is Vc=\",round( ,1),\" V\\nPower loss in circuit is=\",round( ,1),\" W\",i,vr,vc,p)\n"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Ex20.5:pg-984"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 5,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "The current in circuit is I= 2.17 A\n",
+ "Volt meter reading across R Vr= 43.4 V\n",
+ "Volt meter reading across L Vl= 32.7 V\n",
+ "Volt meter reading across c Vc= 57.6 V\n",
+ "\n"
+ ]
+ }
+ ],
+ "source": [
+ " #Example 20_5\n",
+ "\n",
+ "import math \n",
+ "#To find the current in circuit and voltmeters reading across R C and L\n",
+ "f=600 #Units in Hz\n",
+ "l=4.0*10**-3 #Units in H\n",
+ "xl=2*math.pi*f*l #Units in Ohms\n",
+ "c=10.0*10**-6 #Units in F\n",
+ "xc=1/(2*math.pi*f*c) #Units in Ohms\n",
+ "r=20.0 #Units in Ohms\n",
+ "z=math.sqrt(r**2+(xl-xc)**2) #Units in Ohms\n",
+ "v=50.0 #Units in V\n",
+ "i=v/z #Units in A\n",
+ "vr=i*r #Units in V\n",
+ "vl=i*xl #Units in V\n",
+ "vc=i*xc #Units in V\n",
+ "print \"The current in circuit is I=\",round(i,2),\" A\\nVolt meter reading across R Vr=\",round(vr,1),\" V\\nVolt meter reading across L Vl=\",round(vl,1),\" V\\nVolt meter reading across c Vc=\",round(vc,1),\" V\\n\"\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": "2.7.11"
+ }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}
generated by cgit (git 2.34.1) at 2025-03-12 02:13:51 +0000