From 5a86a20b9de487553d4ef88719fb0fd76a5dd6a7 Mon Sep 17 00:00:00 2001 From: hardythe1 Date: Fri, 3 Jul 2015 12:23:43 +0530 Subject: add/remove books --- Engineering_Physics/chapter10.ipynb | 293 ------------------------------------ 1 file changed, 293 deletions(-) delete mode 100755 Engineering_Physics/chapter10.ipynb (limited to 'Engineering_Physics/chapter10.ipynb') diff --git a/Engineering_Physics/chapter10.ipynb b/Engineering_Physics/chapter10.ipynb deleted file mode 100755 index 2fc444d1..00000000 --- a/Engineering_Physics/chapter10.ipynb +++ /dev/null @@ -1,293 +0,0 @@ -{ - "metadata": { - "name": "", - "signature": "sha256:a79be9375f475037255b00d45fe0971e7606cfc4e70e2a086d7c77b20c6b87d7" - }, - "nbformat": 3, - "nbformat_minor": 0, - "worksheets": [ - { - "cells": [ - { - "cell_type": "heading", - "level": 1, - "metadata": {}, - "source": [ - "Chapter10:MAGNETIC PROPERTIES OF MATERIALS" - ] - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Ex10.1:pg-288" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#to calculate permeability and susceptibility of the bar\n", - "phi=2.4*10**-5 #magnetic flux in weber\n", - "A=0.2*10**-4 #cross sectional area in m**2\n", - "B=phi/A #magnetic induction in N/Am\n", - "H=1200 #magnetising field in A/m\n", - "mu=B/H\n", - "print \"permeability is mu=\",\"{:.2e}\".format(mu),\"N/A**2\"\n", - "muo=4*math.pi*10**-7 \n", - "chim=(mu/muo)-1\n", - "print \"susceptibility is chim=\",round(chim,2),\"unitless\"\n", - "#the answer is given wrong in the book (round off error) chim=737\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "permeability is mu= 1.00e-03 N/A**2\n", - "susceptibility is chim= 794.77 unitless\n" - ] - } - ], - "prompt_number": 2 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Ex10.2:pg-289" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#to calculate current should be sent through the solenoid\n", - "l=.10 #length in m\n", - "N=50 #number of turns\n", - "H=5*10**3 #magnetising field in A/m\n", - "i=H*l/N \n", - "print \"current is i=\",i,\"A\"\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "current is i= 10.0 A\n" - ] - } - ], - "prompt_number": 2 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Ex10.3:pg-289" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#to calculate magnetic moment of the rod\n", - "#formula is B=muo*(H+I)\n", - "#where H=ni\n", - "n=500.0 #number of turns in turns/m\n", - "i=0.5 #current passed through the solenoid in A\n", - "mur=1200.0 #relative permeability\n", - "I=(mur-1)*n*i #intensity of magnetisation in A/m\n", - "V=10**-3 #volume in m**3\n", - "M=I*V\n", - "print \"the magnetic moment of the rod is M=\",round(M),\"A-m**2\"\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "the magnetic moment of the rod is M= 300.0 A-m**2\n" - ] - } - ], - "prompt_number": 1 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Ex10.4:pg-290" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#to calculate flux density,magnetic intensity,permeability of iron\n", - "phi=2.0*10**-6 #flux in the ring in weber\n", - "A=10**-4 #cross-sectional area in m**2\n", - "B=phi/A \n", - "print \"flux density is B=\",\"{:.2e}\".format(B),\"weber/m**2\"\n", - "N=200.0 #number of turns\n", - "i=0.30 #current flows in the windings in A\n", - "l=0.2 #length in m\n", - "H=N*i/l\n", - "print \"magnetic intensity is H=\",H,\"A-turn/m\"\n", - "mu=B/H\n", - "print \"permeability is mu=\",round(mu,6),\"weber/A-m\"\n", - "muo=4*math.pi*10**-7 \n", - "mur=mu/muo\n", - "print \"relative permeability is mur=\",round(mur,2),\"unitless\"\n", - "\n", - "#the answer for H in the book is wrong\n", - "#the answer for mu in book is wrong due to wrong H\n", - "#the answer in book for mur is wrong due to \n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "flux density is B= 2.00e-02 weber/m**2\n", - "magnetic intensity is H= 300.0 A-turn/m\n", - "permeability is mu= 6.7e-05 weber/A-m\n", - "relative permeability is mur= 53.05 unitless\n" - ] - } - ], - "prompt_number": 3 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Ex10.5:pg-294" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#to calculate number of ampere turns\n", - "l=0.5 #length in m\n", - "mu=6.5*10**-3 #permeability of iron in henry/m\n", - "A=2*10**-4 #area of cross-section in m**-4\n", - "R=l/(mu*A) #reluctance in A-turns/weber\n", - "flux=4*10**-4 #in weber\n", - "mmf=flux*R\n", - "print \"the number of ampere turns is mmf=\",round(mmf,1),\"ampere-turns\"\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "the number of ampere turns is mmf= 153.8 ampere-turns\n" - ] - } - ], - "prompt_number": 9 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Ex10.6:pg-294" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#to calculate relative permeability of the medium\n", - "phi=1.5*10**-3 #magnetic flux in weber\n", - "l=math.pi*50*10**-2 #length in m\n", - "A=10*10**-4 #area of cross-section\n", - "N=1000 #number of turns\n", - "i=5 #current in A\n", - "muo=4*math.pi*10**-7\n", - "#phi(magnetic flux)=m.m.f/reluctance\n", - "#phi=N*i*muo*mur*A/l\n", - "#we get,\n", - "mur=phi*l/(N*i*A*muo)\n", - "print \"relative permeability of the medium is mur=\",mur,\"unitless\"\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "relative permeability of the medium is mur= 375.0 unitless\n" - ] - } - ], - "prompt_number": 9 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Ex10.7:pg-295" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "import math\n", - "#to calculate magnetising current\n", - "#formula is phi(magnetic flux)=m.m.f/reluctance\n", - "#phi=N*i*mu*A/l--------eq(1)\n", - "#phi=BA------------eq(2)\n", - "B=0.20 #magnetic flux density in weber/m**2\n", - "l=1 #average length of the circuit in m \n", - "N=100 #number of turns\n", - "mu=7.3*10**-3 #in h.m\n", - "#from eq(1)and eq(2),we get\n", - "i=B*l/(N*mu)\n", - "print \"magnetising current is i=\",round(i,3),\"A\"\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "magnetising current is i= 0.274 A\n" - ] - } - ], - "prompt_number": 10 - } - ], - "metadata": {} - } - ] -} \ No newline at end of file -- cgit