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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h1>Chapter 4: Chemical effects of\n",
"electricity</h1>"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 1, page no. 35</h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Determine the e.m.f. and the internal resistance of the batteries formed by (a)Series arrangement and (b)Parallel Arrangement.\n",
"from __future__ import division\n",
"#initializing the variables:\n",
"R = 0.2; # in ohms\n",
"n = 8; # no. of cells\n",
"e = 2.2; # in volts\n",
"\n",
"#calculation:\n",
"es = n*e\n",
"ep = e\n",
"Rs = n*R\n",
"Rp = R/n\n",
"\n",
"#results\n",
"print \"(a)Resistance\", Rs,\"ohms; e.m.f\", es,\"Volts(V)\"\n",
"print \"(b)Resistance\", Rp,\"ohms; e.m.f\", ep,\"Volts(V)\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a)Resistance 1.6 ohms; e.m.f 17.6 Volts(V)\n",
"(b)Resistance 0.025 ohms; e.m.f 2.2 Volts(V)"
]
}
],
"prompt_number": 1
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 2, page no. 35</h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Calculate its terminal p.d. if it delivers (a) 5 A, (b) 50 A\n",
"from __future__ import division\n",
"#initializing the variables:\n",
"r = 0.02; # in ohms\n",
"e = 2; # in volts\n",
"I1 = 5; # in Amperes\n",
"I2 = 50; # in Amperes\n",
"\n",
"#calculation:\n",
"pd1 = e - (I1*r)\n",
"pd2 = e - (I2*r)\n",
"\n",
"#results\n",
"print \"(a)p.d\", pd1,\"Volts(V)\"\n",
"print \"(b)p.d\", pd2,\"Volts(V)\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a)p.d 1.9 Volts(V)\n",
"(b)p.d 1.0 Volts(V)"
]
}
],
"prompt_number": 3
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 3, page no. 36</h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Determine the internal resistance of the battery.\n",
"from __future__ import division\n",
"#initializing the variables:\n",
"e1 = 25; # in volts\n",
"e2 = 24; # in volts\n",
"I2 = 10; # in Amperes\n",
"\n",
"#calculation:\n",
"r = (e1 - e2)/I2\n",
"\n",
"#results\n",
"print \"Resistance\", r,\"Ohms\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Resistance 0.1 Ohms"
]
}
],
"prompt_number": 4
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h3>Example 4, page no. 36</h3>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Determine (a) the current flowing in the circuit and (b) the p.d. at the battery terminals.\n",
"from __future__ import division\n",
"#initializing the variables:\n",
"r = 0.2; # in ohms\n",
"n = 10; # no. of cells\n",
"e = 1.5; # in volts\n",
"R = 58; # in ohms\n",
"\n",
"#calculation:\n",
"es = n*e\n",
"rs = n*r\n",
"I = es/(rs + R)\n",
"pd = es - (I*rs)\n",
"\n",
"#results\n",
"print \"(a)Current\", I,\"Amperes(A)\"\n",
"print \"(b)p.d\", pd,\"Volts(V)\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a)Current 0.25 Amperes(A)\n",
"(b)p.d 14.5 Volts(V)"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
