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{
"metadata": {
"name": "",
"signature": "sha256:bf713428376b6af39f07d5dc1c02aba4029400f6d14863b8b2704c0654b7ab69"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 7 Electromagnetic theory"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.4 Page no 283"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"u =4*10**-7*3.14 #permeability ( free space ) in H/m\n",
"e =8.85*10**-12\n",
"H =1\n",
"\n",
"#Calculation\n",
"import math\n",
"E=H* math.sqrt (u/e)\n",
"\n",
"#Result\n",
"print\"Magnitude of energy of plane wave is\",round(E,2),\"V/m\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Magnitude of energy of plane wave is 376.72 V/m\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.5 Page no 283"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"ur =1 #relative permeability\n",
"er =2\n",
"uo =(4*10**-7*3.14 )\n",
"eo =8.85*10**-12\n",
"Eo =5\n",
"\n",
"#Calculation\n",
"import math\n",
"u=ur*uo\n",
"e=er*eo\n",
"Z= math.sqrt (u/e)\n",
"Ho=Eo/Z\n",
"v =1/(math.sqrt (u*e))\n",
"\n",
"#Result\n",
"print\"(i) Impedence of medium is\",round(Z,2),\"ohm\"\n",
"print\"(ii) Intensity of magnetic field is\",round(Ho*10**2,3),\"*10**-2 A/m\"\n",
"print\"(iii) Velocity of magnetic field is\",round(v*10**-8,2),\"m/s\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(i) Impedence of medium is 266.38 ohm\n",
"(ii) Intensity of magnetic field is 1.877 *10**-2 A/m\n",
"(iii) Velocity of magnetic field is 2.12 m/s\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.6 Page no 284"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"f=3.0*10**11 #frequency of wave in Hz\n",
"c=3.0*10**8\n",
"Eo =50\n",
"\n",
"#Calculation\n",
"w=c/f\n",
"Bo=Eo/c\n",
"\n",
"#Result\n",
"print\"(i) Wavelength of wave is\",w,\"m\"\n",
"print\"(ii) Approx amplitude of oscillating magnetic field is\",round(Bo*10**7,2)*10**-7,\"T\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(i) Wavelength of wave is 0.001 m\n",
"(ii) Approx amplitude of oscillating magnetic field is 1.67e-07 T\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.7 Page no 284"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"r =1.5*10**11 #distance from sun to earth\n",
"P =3.8*10**26 #power radiated by sun\n",
"\n",
"#Calculation\n",
"import math\n",
"N=(P /(4*math.pi*(r**2) ))*60/4.2*10**4\n",
"N1= ceil (N)\n",
"\n",
"#Result\n",
"print\"Average solar energy is\",round(N1*10**-8,0),\"cal/cm2.min\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Average solar energy is 2.0 cal/cm2.min\n"
]
}
],
"prompt_number": 15
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.8 Page no 284"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"p=3.8*10**26 #watts\n",
"r=7*10**8 #m\n",
"\n",
"#Calculation\n",
"import math\n",
"N=p/(4*math.pi*((r)**2))\n",
"\n",
"#Result\n",
"print\"The magnitude of poynting vactor at the surface of the sun is\",round(N*10**-7,3),\"10**7\",\"watt/m**2\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The magnitude of poynting vactor at the surface of the sun is 6.171 10**7 watt/m**2\n"
]
}
],
"prompt_number": 30
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.9 Page no 285"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"a=2\n",
"b=4.18*10**4\n",
"c=60.0\n",
"d=376.72\n",
"\n",
"#Calculation\n",
"import math \n",
"E=a*b/c\n",
"E1=math.sqrt(E*d)\n",
"E2=E1/d\n",
"H=E1*math.sqrt(2)\n",
"H1=E2*math.sqrt(2)\n",
"\n",
"#Result \n",
"print\"The amplitudes of electrons is\",round(H,0),\"V/m\"\n",
"print\"The amplitudes of magnetic field is\",round(H1,3),\"Amp/m\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The amplitudes of electrons is 1025.0 V/m\n",
"The amplitudes of magnetic field is 2.72 Amp/m\n"
]
}
],
"prompt_number": 68
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.10 Page no 285"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"v =0.62 #velocity factor of coaxial\n",
"\n",
"#Calculation\n",
"Er =1/v**2\n",
"\n",
"#Result\n",
"print\"Dielecric constant of instulator is\",round(Er,2)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Dielecric constant of instulator is 2.6\n"
]
}
],
"prompt_number": 17
}
],
"metadata": {}
}
]
}
|
