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"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"10: Magnetic properties of materials"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 10.1, Page number 247"
]
},
{
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"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"r = 0.052; #radius of orbit(nm)\n",
"B = 1; #magnetic field(Wb/m**2)\n",
"e = 1.6*10**-19; #charge of electron(c)\n",
"m = 9.1*10**-31; #mass of electron(kg)\n",
"\n",
"#Calculation\n",
"r = r*10**-9; #radius of orbit(m)\n",
"delta_mew = (e**2)*(r**2)*B/(4*m); #change in magnetic moment(Am**2)\n",
"\n",
"#Result\n",
"print \"change in magnetic moment is\",round(delta_mew/1e-29,3),\"*10**-29 Am**2\"\n",
"print \"answer given in the book is wrong\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"change in magnetic moment is 1.902 *10**-29 Am**2\n",
"answer given in the book is wrong\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
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|
