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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 8: Magnetic materials"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 8.1: Determine_magnitude_and_direction_of_magnetic_moment.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"// chapter 8 , Example 8.1 , pg 238\n",
"I=12 // current(in A)\n",
"A=7.5*10^-4 //area(in m^2)\n",
"M=I*A //magnetic moment associated with the loop\n",
"printf('Magnetic moment associated with the loop(in A m^2)=')\n",
"disp(M)\n",
"printf('M is directed away from the observer and is perpendicular to the plane of the loop')"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 8.2: Determine_magnetic_moment.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"// chapter 8 , Example 8.2 , pg 238\n",
"r=0.5*10^-10 //radius of orbit (in m)\n",
"e= 1.6*10^-19 //charge on electron (in C)\n",
"n=10^16 //frequency of revolution of electron (in rps)\n",
"I=e*n //current (in A)\n",
"A=%pi *r^2 //area (in m^2)\n",
"M=I*A //magnetic moment associated with motion of electron \n",
"printf('Magnetic moment associated with motion of electron (in A m^2)')\n",
"disp(M)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 8.3: calculate_magnetic_susceptibility.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"// chapter 8 , Example 8.3 , pg 239\n",
"ur=5000 //relative permeability\n",
"xm=ur-1 //magnetic susceptibility\n",
"printf('Magnetic susceptibility=')\n",
"disp(xm)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 8.4: calculate_permeability.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"// chapter 8 , Example 8.4 , pg 239\n",
"H=1800 //magnetizing field (in A/m)\n",
"phi=3*10^-5 //magnetic flux (in Wb)\n",
"A=0.2 *10^-4 //area (in m^2)\n",
"B=phi/A //magnetic flux density (in Wb/m^2)\n",
"u=B/H //permeability (in H/m)\n",
"printf('permeability (in H/m )=')\n",
"disp(u)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 8.5: calculate_magnetic_moment.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"// chapter 8 , Example 8.5 , pg 239\n",
"B=0.65 //magnetic induction (in T)\n",
"d=8906 //density (in Kg/m^3)\n",
"M=58.7 //atomic weight\n",
"e=1.6*10^-19 //charge of electron (in C)\n",
"h=6.625*10^-34 //plancks constant (in m^2*Kg*S^-1)\n",
"m=9.11*10^-31 //mass of electron (in Kg)\n",
"Uo=4*%pi*10^-7 //vacuum permeability\n",
"Na=6.023*10^26 //Avogadro constant\n",
"Ub=(e*h)/(4*%pi*m) //Bhor magneton (in A*m^2)\n",
"N=(d*Na)/M //number of atoms per unit volume\n",
"Ur=B/(N*Uo) //relative permeability (in A/m^2)\n",
"M=Ur/(Ub) //magnetic moment\n",
"printf('Magnetic moment')\n",
"printf('M=%.2f A*m^2',M)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Scilab",
"language": "scilab",
"name": "scilab"
},
"language_info": {
"file_extension": ".sce",
"help_links": [
{
"text": "MetaKernel Magics",
"url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
}
],
"mimetype": "text/x-octave",
"name": "scilab",
"version": "0.7.1"
}
},
"nbformat": 4,
"nbformat_minor": 0
}
|
