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{
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"name": "",
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Appendix B EM waves in conducting Medium"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example B.1 Page no 414"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"a=5.8*10**7 #s/m\n",
"v=1 #MHz\n",
"\n",
"#Calculation\n",
"import math\n",
"u=4*math.pi*10**-7\n",
"d=v/math.sqrt((math.pi*10**-6*u*a))\n",
"\n",
"#Result\n",
"print\"Skin depth is\",round(d*10**-3,3),\"mm\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Skin depth is 0.066 mm\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example B.2 Page no 414"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"a=2.56*10**-4\n",
"n=10.0**10\n",
"er=2.3\n",
"e0=8.85*10**-12\n",
"c=3*10**8\n",
"\n",
"#Calculation\n",
"import math\n",
"v=a/(2*math.pi*n*er*e0)\n",
"V=c*math.sqrt(1/er)\n",
"B=(v*2*math.pi*n)/(2*v)\n",
"\n",
"#Result\n",
"print\"Phase velocity is\", round(V*10**-8,2),\"*10**8 m/s\"\n",
"print\"Magnitude of attenuation constant is\",round(B*10**-10,2),\"*10**-2\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Phase velocity is 1.98 *10**8 m/s\n",
"Magnitude of attenuation constant is 3.14 *10**-2\n"
]
}
],
"prompt_number": 27
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example B.3 Page no 415"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"n=1.6*10**6 #Hz\n",
"a=38.3*10**6 #/sm\n",
"\n",
"#Calculation\n",
"import math\n",
"d=1/(math.sqrt(math.pi*n*a*math.pi*4*10**-7))\n",
"v=2*math.pi*n*d\n",
"\n",
"#Result\n",
"print\"Skin depth is\", round(d*10**6,1),\"micro m\"\n",
"print\"Wave velocity is\",round(v,0),\"m/s\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Skin depth is 64.3 micro m\n",
"Wave velocity is 646.0 m/s\n"
]
}
],
"prompt_number": 35
}
],
"metadata": {}
}
]
}
|
