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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 14: Inductance and Magnetic Fields"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 14.1, Page 280"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Magnetic Field Strength, H = 7.96 A/m\n"
]
}
],
"source": [
"#Initialization\n",
"i=5 #current in ampere\n",
"l=0.628 #circumference\n",
"\n",
"\n",
"#Calculation\n",
"h=i/l #magnetic field strength\n",
"\n",
"#Results\n",
"print'Magnetic Field Strength, H = %.2f A/m'%h"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 14.2, Page 283"
]
},
{
"cell_type": "code",
"execution_count": 8,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"(a) Magnetomotive Force, H = 3000.00 ampere-turns\n",
"(b) Magnetic Field Strength, H = 7500.00 A/m\n",
"(c) B = 9.42 mT\n",
"(d) Toal Flux, phi = 2.83 uWb\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"i=6 #current in ampere\n",
"n=500 #turns\n",
"l=0.4 #circumference\n",
"uo=4*math.pi*10**-7 #epsilon zero constant\n",
"a=300*10**-6 #area\n",
"\n",
"#Calculation\n",
"f=n*i #Magnetomotive Force\n",
"h=f/l #magnetic field strength\n",
"b=uo*h #magnetic induction\n",
"phi=b*a #flux\n",
"\n",
"#Results\n",
"print'(a) Magnetomotive Force, H = %.2f ampere-turns'%f\n",
"print'(b) Magnetic Field Strength, H = %.2f A/m'%h\n",
"print'(c) B = %.2f mT'%(b*10**3)\n",
"print'(d) Toal Flux, phi = %.2f uWb'%(phi*10**6)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 14.3, Page 285"
]
},
{
"cell_type": "code",
"execution_count": 11,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Voltage, V = 30 mV\n"
]
}
],
"source": [
"#Initialization\n",
"l=10*10**-3 #inductance in henry\n",
"di=3\n",
"\n",
"\n",
"#Calculation\n",
"v=l*di #voltage \n",
"\n",
"#Results\n",
"print'Voltage, V = %d mV'%(v*10**3)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 14.4, Page 287"
]
},
{
"cell_type": "code",
"execution_count": 15,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Inductance,L = 30 uH\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"n=400 #turns\n",
"l=200*10**-3 #circumference\n",
"uo=4*math.pi*10**-7 #epsilon zero constant\n",
"a=30*10**-6 #area\n",
"\n",
"#Calculation\n",
"L=(uo*a*n**2)/l #Inductance in henry \n",
"\n",
"#Results\n",
"print'Inductance,L = %d uH'%(L*10**6)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 14.5, Page 289"
]
},
{
"cell_type": "code",
"execution_count": 21,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"(a) Inductance in series,L = 30 uH\n",
"(b) Inductance in parallel,L = 6.67 uH\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"l1=10 #Inductance in henry \n",
"l2=20 #Inductance in henry \n",
"\n",
"#Calculation\n",
"ls=l1+l2 #Inductance in henry \n",
"lp=((l1*l2)*(l1+l2)**-1) #Inductance in henry \n",
"#Results\n",
"print'(a) Inductance in series,L = %d uH'%ls\n",
"print'(b) Inductance in parallel,L = %.2f uH'%lp"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 14.6, Page 293"
]
},
{
"cell_type": "code",
"execution_count": 26,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Stored Energy = 125 mJ\n"
]
}
],
"source": [
"import math\n",
"#Initialization\n",
"l=10**-2 #Inductance in henry \n",
"i=5 #current in ampere \n",
"\n",
"#Calculation\n",
"s=0.5*l*i**2 #stored energy\n",
"\n",
"#Results\n",
"print'Stored Energy = %d mJ'%(s*10**3)\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
}
],
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"anaconda-cloud": {},
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"display_name": "Python [Root]",
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"name": "Python [Root]"
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|
