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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 20: Super Conducting Materials"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 20.2, page no-568"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Critical field\n",
"\n",
"import math\n",
"#variable declaration\n",
"h0=0.0306 # critical field\n",
"t1=2.0 # Temperature \n",
"t2=3.7 # Temperature corresponds to h0\n",
"\n",
"#calculation\n",
"he=h0*(1-((t1**2)/t2**2))\n",
"\n",
"#Result\n",
"print(\"The critical field at %d K is %.5f T\"%(t1,he))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The critical field at 2 K is 0.02166 T\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 20.3, page no-569"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Critical current for a wire\n",
"\n",
"import math\n",
"#variable declaration\n",
"t1=4.2 # Temperature \n",
"t2=7.18 # critical Temperature\n",
"h0=6.5*10**4 # critical magnetic field\n",
"\n",
"#calculations\n",
"he=h0*(1-((t1**2)/t2**2)) \n",
"r=0.5*10**-3\n",
"I=2*3.14*he*r\n",
"\n",
"#Result\n",
"print(\"The critical current through a wire of lead is %.2f A\"%I)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The critical current through a wire of lead is 134.26 A\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 20.4, page no-570"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#critical temperature\n",
"\n",
"import math\n",
"#variable declaration\n",
"tc1=4.185 # Critical temperature of lead\n",
"m1=199.5 # isotopic mass 1\n",
"m2=203.4 # isotopic mass 2\n",
"\n",
"#calculation\n",
"tc2=tc1* math.sqrt(m1/m2)\n",
"\n",
"#Result\n",
"print(\"The critical temperature for metal with isotopic mass of %.1f is %.3f K\"%(m2,tc2))\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The critical temperature for metal with isotopic mass of 203.4 is 4.145 K\n"
]
}
],
"prompt_number": 9
}
],
"metadata": {}
}
]
}
|
