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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 7: Electricity"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.1: Electric_potential_strength.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"e=1.6*10^-19 //charge of electron\n",
"r=0.075*10^-3 // radius of electron\n",
"ep=8.85*10^-12 //permittivity of free space\n",
"//calculation\n",
"v=-e/(4*%pi*ep*r)//electric potential\n",
"e=-e/(4*%pi*ep*r*r)//electric field strength\n",
"//output\n",
"printf('resultant potential is %3.3e V',v)\n",
"printf('\n resultant electric field strength %3.3f V/m',e)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.2: ratio_of_force.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"q=2.4*10^-19 //charge1\n",
"Q=3.8*10^-19//charge2\n",
"ep=8.85*10^-12//permittivity of free space\n",
"G=6.7*10^-11\n",
"m=8.9*10^-31//mass 1\n",
"M=1.5*10^-30//mass 2\n",
"//calculation\n",
"x=q*Q/(4*%pi*ep*m*M*G)//coulumbs law\n",
"//output\n",
"printf('the ratio of electrostatic force between charges %3.3e',x)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.3: emf_and_internal_resistance.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"i=0.5 //current in circuit\n",
"R=6 //resistance of circuit\n",
"i1=0.3//dropped current\n",
"//calculation\n",
"r=1.2/0.2\n",
"e=i*(r+R)//ohms law\n",
"//output\n",
"printf('the battery emf is %3.3f V',e)\n",
"printf('\n the internal resistence is %3.3f ohm',r)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.4: power_output.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"d=8.2*10^-7 //resistivity of coil\n",
"l=15 //length of wire\n",
"r=0.3*10^-3 //radius of wires\n",
"v=160 //power output\n",
"//calculations\n",
"R=d*l/(%pi*r*r)\n",
"p=v*v/R //for one coil\n",
"p1=v*v/(R+R) //for two coils in series\n",
"rp=(R*R)/(R+R)//total resistence \n",
"pp=(v*v)/rp//total power\n",
"//output\n",
"printf('the power when one coil is %3.3f W',p)\n",
"printf('\nthe power when two coils in series is %3.3f W',p1)\n",
"printf('\n the power when coils in parallel is %3.3f W',pp)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.5: percent_of_pd.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"r1=40//resistance 1\n",
"r2=20//resistamce 2\n",
"r3=10//resistance 3\n",
"v=1.6//voltage\n",
"//calculation\n",
"R=r1+r2+r3//total resistance in series\n",
"x=((v*r1)*70)/((2*50)*(1.6*40))//fraction of pd\n",
"x=x*100//percentage pd\n",
"//output\n",
"printf('the percentage of pd is %3.0f percent',x)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.6: final_resistance_calculation.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"a=4.3*10^-3//temperature co-efficient of resistance\n",
"//calculation\n",
"r2=((60*a+1)/(20*a+1))*10//resistance \n",
"//output\n",
"printf('the final resistence is %3.3f ohm',r2)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.7: internal_resistance_calculation.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"l1=82.3//balance length with switch open\n",
"l2=75.8//balance length with switch closed\n",
"R=9//resistance\n",
"//calculation\n",
"r=(R*l1/l2)-R//internal resistance\n",
"//output\n",
"printf('the internal resistence is %3.3f ohm',r)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 7.8: calculation_of_resistance.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"clear\n",
"//input\n",
"p=2*10^-6//pd across wire\n",
"v=1.5//voltage \n",
"l=1.5*10^3//length of potentiometer\n",
"R=7//resistance\n",
"//calculation\n",
"vw=p*l//pd across the wire\n",
"x=(7*v/vw)-R//resistace of x\n",
"//output\n",
"printf('the resistance of x is %3.0f ohm',x)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Scilab",
"language": "scilab",
"name": "scilab"
},
"language_info": {
"file_extension": ".sce",
"help_links": [
{
"text": "MetaKernel Magics",
"url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
}
],
"mimetype": "text/x-octave",
"name": "scilab",
"version": "0.7.1"
}
},
"nbformat": 4,
"nbformat_minor": 0
}
|
