{
"metadata": {
"name": "",
"signature": "sha256:859464a7b9c1dff7d24f65e6024e51cc8bc55fc7979a3e8c04919720ca49d3b9"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 15 Classification of Magnetic Materials"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 15.1 Page no 457"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"q=0.12 #TA**-1m\n",
"q1=4*math.pi*10**-7 #TA**-1m\n",
"\n",
"#Calculation\n",
"import math\n",
"q3=q/q1\n",
"e=q3-1\n",
"\n",
"#Result\n",
"print\"Relative permeability is\",round(q3*10**-4,2),\"10**4\"\n",
"print\"susceptibility is\",round(e*10**-4,2),\"10**4\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Relative permeability is 9.55 10**4\n",
"susceptibility is 9.55 10**4\n"
]
}
],
"prompt_number": 17
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 15.2 Page no 457"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"A=0.5*10**-4 #m**2\n",
"H=1200 #Am**-1\n",
"W=599\n",
"Q=4*math.pi*10**-7 #TA\"**-1m\n",
"\n",
"#Calculation\n",
"import math\n",
"Z=Q*(1+W)\n",
"Z1=Z*H\n",
"Z2=Z1*A\n",
"\n",
"#Result\n",
"print\"(i) Z produced is\",round(Z*10**4,2),\"10**-4\",\"TA**-1m\"\n",
"print\"(ii) Z1 produced is\",round(Z1,3),\"T\"\n",
"print\"(iii) Z2 produced is\",round(Z2*10**5,3),\"10**-5\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(i) Z produced is 7.54 10**-4 TA**-1m\n",
"(ii) Z1 produced is 0.905 T\n",
"(iii) Z2 produced is 4.524 10**-5\n"
]
}
],
"prompt_number": 66
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 15.3 Page no 457"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"I=1.2 #A\n",
"Q=800\n",
"A=0.15 #m\n",
"S=3500\n",
"K=4*math.pi*10**-7\n",
"\n",
"#Calculation\n",
"import math\n",
"L=2*math.pi*A\n",
"n=S/L\n",
"B=(K*Q*S*I)/L\n",
"\n",
"#Result\n",
"print\"The magnetic field in the core for a magnetising current of 1.2 A is\",B,\"T\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The magnetic field in the core for a magnetising current of 1.2 A is 4.48 T\n"
]
}
],
"prompt_number": 73
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 15.4 Page no 457"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"H=2*10**3 #Am**-1\n",
"I=4.8*10**-2 #Am**-1\n",
"T=280 #K\n",
"T1=320.0 #K\n",
"\n",
"#Calculation\n",
"S=I/H\n",
"S1=S*(T/T1)\n",
"S2=S1*H\n",
"\n",
"#Result\n",
"print\"The susceptibility of aluminium is raised to 280 k is\",S*10**5,\"10**3\"\n",
"print\"The temperature of the aluminium is raised to 320 k is\",S1\n",
"print\"The suscepitibility and intensity of magnetistionis\",S2*10**2,\"10**-2\",\"Am**-1\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The susceptibility of aluminium is raised to 280 k is 2.4 10**3\n",
"The temperature of the aluminium is raised to 320 k is 2.1e-05\n",
"The suscepitibility and intensity of magnetistionis 4.2 10**-2 Am**-1\n"
]
}
],
"prompt_number": 90
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 15.5 Page no 458"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"W=3.2*10**4 #J\n",
"M=8.4\n",
"D=7200\n",
"v=50 #cycle s**-1\n",
"T=30*60 #s\n",
"\n",
"#Calculation\n",
"V=M/D\n",
"Q=W/(V*v*T)\n",
"\n",
"#Result\n",
"print\"The value of energy is\",round(Q,1),\"J m**-3 cycle**-1\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The value of energy is 304.8 J m**-3 cycle**-1\n"
]
}
],
"prompt_number": 95
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 15.6 Page no 458"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"m=4.5 #Am\n",
"l=0.06 #m\n",
"A=0.9*10**-4 #m**2\n",
"r=0.06 #m\n",
"J=4*math.pi*10**-7\n",
"\n",
"#Calculation\n",
"I=m/A\n",
"H1=m/(4*math.pi*r**2)\n",
"H2=m/(4*math.pi*r**2)\n",
"H=H1+H2\n",
"B=J*(-H+I)\n",
"\n",
"#Result\n",
"print\"(a) Intensity of the magnetisation is\", I*10**-4,\"10**4 A/m\"\n",
"print\"(b) Magnetic intensity is\",round(H,0),\"A/m\"\n",
"print\"(c) Magnetic induction is\",round(B*10**2,2),\"*10**-2 T\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a) Intensity of the magnetisation is 5.0 10**4 A/m\n",
"(b) Magnetic intensity is 199.0 A/m\n",
"(c) Magnetic induction is 6.26 *10**-2 T\n"
]
}
],
"prompt_number": 16
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 15.7 Page no 458"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"m=1.5*10**-23 #J/T\n",
"n=2.0*10**24\n",
"a=15 #%\n",
"T1=4.2 #K\n",
"T2=2.8\n",
"B1=0.84 #T\n",
"B2=0.98\n",
"\n",
"#Calculation\n",
"M=m*n\n",
"M1=M*(a/100.0)\n",
"M2=M1*T1*B2/(T2*B1)\n",
"\n",
"#Result\n",
"print\"Total dipole moment is\",M2,\"J/T\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Total dipole moment is 7.875 J/T\n"
]
}
],
"prompt_number": 18
}
],
"metadata": {}
}
]
}