{"id":45,"date":"2023-05-03T08:45:13","date_gmt":"2023-05-03T06:45:13","guid":{"rendered":"https:\/\/www.inventable.eu\/IT\/?p=45"},"modified":"2023-05-03T08:45:13","modified_gmt":"2023-05-03T06:45:13","slug":"legge-di-ohm-calcolatore-on-line","status":"publish","type":"post","link":"https:\/\/www.inventable.eu\/IT\/legge-di-ohm-calcolatore-on-line\/","title":{"rendered":"Legge di Ohm: calcolatore on-line"},"content":{"rendered":"<p><em>Introdurre solo <strong>due parametri<\/strong> per effettuare il calcolo. Nel caso di <strong>valori decimali usare il punto<\/strong> come separatore e non la virgola, ad esempio: <strong>2.45<\/strong> invece di 2,45<\/em><\/p>\n<p><script type \"text\/javascript\">\r\n\r\nvar arrayResStandard1 = new Array();\r\nvar arrayResStandard2 = new Array();\r\nvar Rin = 0;\r\nvar Rout = 0;\r\nvar R1out = 0;  \r\nvar R2out = 0;\t\r\n\r\n\/\/ -------------------------------------------------------------------------------\r\n\/\/ Clear Data\r\n\/\/ -------------------------------------------------------------------------------\r\nfunction ClearData() {\r\n\t\tdocument.getElementById(\"txtTension\").value = \"\";\r\n\t\tdocument.getElementById(\"txtCorriente\").value = \"\";\r\n\t\tdocument.getElementById(\"txtResistencia\").value = \"\";\r\n\t\tdocument.getElementById(\"txtPotencia\").value = \"\";\r\n\t\tdocument.getElementById(\"mensaje\").style.color = 'black';\r\n\t\tdocument.getElementById(\"cmbTension\").selectedIndex = 0;\r\n\t\tdocument.getElementById(\"cmbCorriente\").selectedIndex = 0;\r\n\t\tdocument.getElementById(\"cmbResistencia\").selectedIndex = 0;\r\n\t\tdocument.getElementById(\"cmbPotencia\").selectedIndex = 0;\r\n\t\tdocument.getElementById(\"mensaje\").innerHTML = \"<i>Introdurre solo doe parametri per effettuare il calcolo.<\/i>\";\r\n}\r\n\/\/ -------------------------------------------------------------------------------\r\n\/\/ Clear Data\r\n\/\/ -------------------------------------------------------------------------------\r\nfunction CalcFormula() {\r\n\r\n\tvar tension = 0;\r\n\tvar corriente = 0;\r\n\tvar resistencia = 0;\r\n\tvar potencia = 0;\r\n\tvar param_counter = 0;\r\n\t\r\n\tif (document.getElementById(\"txtTension\").value > 0) param_counter = 1;\r\n\tif (document.getElementById(\"txtCorriente\").value > 0) param_counter++;\r\n\tif (document.getElementById(\"txtResistencia\").value > 0) param_counter++;\r\n\tif (document.getElementById(\"txtPotencia\").value > 0) param_counter++;\r\n\tif (param_counter > 2 )\r\n\t\t{\r\n\t\t\tdocument.getElementById(\"mensaje\").style.color = 'red';\r\n\t\t\tdocument.getElementById(\"mensaje\").innerHTML = \"<i><b>Error: has introducido m\u00e1s de dos par\u00e1metros y el c\u00e1lculo no puede ser efectuado.<\/b><\/i>\";    \r\n\t\t\treturn\r\n\t\t}\r\n\tif (document.getElementById(\"txtTension\").value > 0)\r\n\t\t{\r\n\t\t\ttension = document.getElementById(\"txtTension\").value;\r\n\t\t\tif (document.getElementById(\"cmbTension\").selectedIndex == 1)tension = tension * 1000;\r\n\t\t\tif (document.getElementById(\"txtCorriente\").value > 0)\r\n\t\t\t\t{\r\n\t\t\t\tcorriente = document.getElementById(\"txtCorriente\").value;\r\n\t\t\t\tif (document.getElementById(\"cmbCorriente\").selectedIndex == 1)corriente = corriente \/ 1000;\r\n\t\t\t\twattFormat(corriente * tension);\r\n\t\t\t\tohmsFormat(tension \/ corriente);\r\n\t\t\t\t\r\n\t\t\t\t}\r\n\t\t\telse if (document.getElementById(\"txtResistencia\").value > 0)\r\n\t\t\t\t{\r\n\t\t\t\tresistencia = document.getElementById(\"txtResistencia\").value;\r\n\t\t\t\tif (document.getElementById(\"cmbResistencia\").selectedIndex == 1) resistencia = resistencia * 1000;\r\n\t\t\t\telse if (document.getElementById(\"cmbResistencia\").selectedIndex == 2) resistencia = resistencia * 1000 * 1000;\r\n\t\t\t\t\r\n\t\t\t\twattFormat(tension * tension \/ resistencia );\r\n\t\t\t\tampFormat(tension \/ resistencia);\r\n\t\t\t\t\r\n\t\t\t\t}\r\n\t\t\telse if (document.getElementById(\"txtPotencia\").value > 0)\r\n\t\t\t\t{\r\n\t\t\t\tpotencia = document.getElementById(\"txtPotencia\").value;\r\n\t\t\t\tif (document.getElementById(\"cmbPotencia\").selectedIndex == 1) potencia = potencia \/ 1000;\r\n\t\t\t\telse if (document.getElementById(\"cmbPotencia\").selectedIndex == 2) potencia = potencia * 1000;\r\n\t\t\t\tampFormat(potencia \/ tension);\r\n\t\t\t\tohmsFormat(tension * tension \/ potencia);\t\t\t\t\r\n\t\t\t\t\r\n\t\t\t\t}\r\n\t\t}\r\n\r\n\telse if (document.getElementById(\"txtCorriente\").value > 0)\r\n\t\t{\r\n\t\t\tcorriente = document.getElementById(\"txtCorriente\").value;\r\n\t\t\tif (document.getElementById(\"cmbCorriente\").selectedIndex == 1)corriente = corriente \/ 1000;\r\n\r\n\t\t\tif (document.getElementById(\"txtResistencia\").value > 0)\r\n\t\t\t\t{\r\n\t\t\t\tresistencia = document.getElementById(\"txtResistencia\").value;\r\n\t\t\t\tif (document.getElementById(\"cmbResistencia\").selectedIndex == 1) resistencia = resistencia * 1000;\r\n\t\t\t\telse if (document.getElementById(\"cmbResistencia\").selectedIndex == 2) resistencia = resistencia * 1000 * 1000;\t\t\t\t\r\n\t\t\t\tvoltsFormat(corriente * resistencia );\r\n\t\t\t\twattFormat(corriente * corriente * resistencia);\r\n\t\t\t\t\r\n\t\t\t\t}\r\n\t\t\telse if (document.getElementById(\"txtPotencia\").value > 0)\r\n\t\t\t\t{\r\n\t\t\t\tpotencia = document.getElementById(\"txtPotencia\").value;\r\n\t\t\t\tif (document.getElementById(\"cmbPotencia\").selectedIndex == 1) potencia = potencia \/ 1000;\r\n\t\t\t\telse if (document.getElementById(\"cmbPotencia\").selectedIndex == 2) potencia = potencia * 1000;\t\t\t\t\r\n\t\t\t\tvoltsFormat(potencia \/ corriente);\r\n\t\t\t\tohmsFormat(potencia \/ corriente \/ corriente);\t\t\t\t\r\n\t\t\t\t\r\n\t\t\t\t}\r\n\t\t}\r\n\r\n\telse if (document.getElementById(\"txtResistencia\").value > 0)\r\n\t\t{\r\n\t\t\tresistencia = document.getElementById(\"txtResistencia\").value;\r\n\t\t\tif (document.getElementById(\"cmbResistencia\").selectedIndex == 1) resistencia = resistencia * 1000;\r\n\t\t\telse if (document.getElementById(\"cmbResistencia\").selectedIndex == 1) resistencia = resistencia * 1000 * 1000;\t\t\t\r\n\r\n\t\t\tif (document.getElementById(\"txtPotencia\").value > 0)\r\n\t\t\t\t{\r\n\t\t\t\tpotencia = document.getElementById(\"txtPotencia\").value;\r\n\t\t\t\tif (document.getElementById(\"cmbPotencia\").selectedIndex == 1) potencia = potencia \/ 1000;\r\n\t\t\t\telse if (document.getElementById(\"cmbPotencia\").selectedIndex == 2) potencia = potencia * 1000;\t\t\t\t\r\n\t\t\t\tvoltsFormat(Math.sqrt(potencia * resistencia ));\r\n\t\t\t\tampFormat(Math.sqrt(potencia \/ resistencia));\r\n\t\t\t\t}\r\n\t\t}\t\t\r\n}\r\n\r\n\/\/ -------------------------------------------------------------------------------\r\n\/\/ Ohms Format\r\n\/\/ -------------------------------------------------------------------------------\r\nfunction ohmsFormat(ohmsValue){\r\n\tif (ohmsValue >= 1e6)\r\n\t\t{\r\n\t\tohmsValue \/=1e6;\r\n\t\tdocument.getElementById(\"txtResistencia\").value = roundTo(ohmsValue, 2);\r\n\t\tdocument.getElementById(\"cmbResistencia\").selectedIndex = 2;\t\r\n\t\t}\r\n\telse if (ohmsValue >= 1e3)\r\n\t\t{\r\n\t\tohmsValue \/=1e3\r\n\t\tdocument.getElementById(\"txtResistencia\").value = roundTo(ohmsValue, 2);\r\n\t\tdocument.getElementById(\"cmbResistencia\").selectedIndex = 1;\t\r\n\t\t}\r\n\telse if (ohmsValue === undefined)\r\n\t\t{\r\n\t\tdocument.getElementById(\"txtResistencia\").value = \"\";\r\n\t\tdocument.getElementById(\"cmbResistencia\").selectedIndex = 0;\t\r\n\t\t}\r\n\telse \r\n\t\t{\r\n\t\tdocument.getElementById(\"txtResistencia\").value = roundTo(ohmsValue, 2);\r\n\t\tdocument.getElementById(\"cmbResistencia\").selectedIndex = 0;\t\r\n\t\t}\r\n}\t\t\r\n\r\n\/\/ -------------------------------------------------------------------------------\r\n\/\/ Volts Format\r\n\/\/ -------------------------------------------------------------------------------\r\nfunction voltsFormat(voltsValue){\r\n\tif (voltsValue >= 1e3)\r\n\t\t{\r\n\t\tvoltsValue \/=1e3\r\n\t\tdocument.getElementById(\"txtTension\").value = roundTo(voltsValue, 2);\r\n\t\tdocument.getElementById(\"cmbTension\").selectedIndex = 1;\t\r\n\t\t}\r\n\telse if (voltsValue === undefined)\r\n\t\t{\r\n\t\tdocument.getElementById(\"txtTension\").value = \"\";\r\n\t\tdocument.getElementById(\"cmbTension\").selectedIndex = 0;\t\r\n\t\t}\r\n\telse \r\n\t\t{\r\n\t\tdocument.getElementById(\"txtTension\").value = roundTo(voltsValue, 2);\r\n\t\tdocument.getElementById(\"cmbTension\").selectedIndex = 0;\t\r\n\t\t}\r\n}\t\t\r\n\r\n\/\/ -------------------------------------------------------------------------------\r\n\/\/ Current Format\r\n\/\/ -------------------------------------------------------------------------------\r\nfunction ampFormat(ampsValue){\r\n\tif (ampsValue < 0.1)\r\n\t\t{\r\n\t\tampsValue *=1e3\r\n\t\tdocument.getElementById(\"txtCorriente\").value = roundTo(ampsValue, 2);\r\n\t\tdocument.getElementById(\"cmbCorriente\").selectedIndex = 1;\t\r\n\t\t}\r\n\telse if (ampsValue === undefined)\r\n\t\t{\r\n\t\tdocument.getElementById(\"txtCorriente\").value = \"\";\r\n\t\tdocument.getElementById(\"cmbCorriente\").selectedIndex = 0;\t\r\n\t\t}\r\n\telse \r\n\t\t{\r\n\t\tdocument.getElementById(\"txtCorriente\").value = roundTo(ampsValue, 2);\r\n\t\tdocument.getElementById(\"cmbCorriente\").selectedIndex = 0;\t\r\n\t\t}\r\n}\t\t\r\n\r\n\/\/ -------------------------------------------------------------------------------\r\n\/\/ Watt Format\r\n\/\/ -------------------------------------------------------------------------------\r\nfunction wattFormat(wattsValue){\r\n\tif (wattsValue >= 1e3)\r\n\t\t{\r\n\t\twattsValue \/=1e3\r\n\t\tdocument.getElementById(\"txtPotencia\").value = roundTo(wattsValue, 2);\r\n\t\tdocument.getElementById(\"cmbPotencia\").selectedIndex = 2;\t\r\n\t\t}\r\n\telse if (wattsValue < 0.1)\r\n\t\t{\r\n\t\twattsValue *=1e3\r\n\t\tdocument.getElementById(\"txtPotencia\").value = roundTo(wattsValue, 2);\r\n\t\tdocument.getElementById(\"cmbPotencia\").selectedIndex = 1;\t\t\t\r\n\t\t}\r\n\telse if (wattsValue === undefined)\r\n\t\t{\r\n\t\tdocument.getElementById(\"txtPotencia\").value = \"\";\r\n\t\tdocument.getElementById(\"cmbPotencia\").selectedIndex = 0;\t\r\n\t\t}\r\n\telse \r\n\t\t{\r\n\t\tdocument.getElementById(\"txtPotencia\").value = roundTo(wattsValue, 2);\r\n\t\tdocument.getElementById(\"cmbPotencia\").selectedIndex = 0;\t\r\n\t\t}\r\n}\t\t\r\n\r\n\/\/ -------------------------------------------------------------------------------\r\n\/\/ Redondea a X decimal\r\n\/\/ -------------------------------------------------------------------------------\r\nfunction roundTo(value, quantos_decimales)\r\n{\r\n    var i = value * Math.pow(10,quantos_decimales);\r\n    i = Math.round(i);\r\n    return i \/ Math.pow(10,quantos_decimales);\r\n}\r\n\r\n<\/script>\r\n\r\n<style>\r\n\r\ntd{\r\nborder: 0px;\r\n}\r\n\r\ntd.simbolo{\r\n\ttext-align:right;\r\n\t}\r\n\r\ninput[type=text],select {\r\n\ttext-align:center !important;\r\n\tbackground:#EEE !important;\r\n\tborder: 1px solid #AAA !important;\r\n\tfont-size: 130% !important;\r\n\tcolor:black !important; \r\n        }\r\n\r\n}\r\n\r\nselect {\r\n\tfont-size: 130%;\r\n}\r\n\r\nimg\t{\t\r\n\tvertical-align:text-top;\r\n\t}\r\n\t\r\n<\/style>\r\n<div style=\"text-align:center\">\r\n<table id=\"OhmLawDesignTable\" style=\"text-align:center; border: 0px;\">\r\n\t<tr>\r\n\t\t<td class=\"simbolo\"><img decoding=\"async\" src=\"https:\/\/www.inventable.eu\/IT\/media\/OhmLawCalculator\/V_symbol_low.png\"><\/td> \r\n\t\t<td>Tensi\u00f3n<BR>\r\n\t\t\t<input type=\"text\" id= \"txtTension\" name=\"tension\" value=\"\" style=\"width: 100px\">\r\n\t\t\t<select id=\"cmbTension\">\r\n\t\t\t\t<option>V\r\n\t\t\t\t<option>KV\r\n\t\t\t<\/select>\r\n\t\t<\/td>\r\n\t<\/tr>\r\n\t\r\n\t<tr>\r\n\t\t<td class=\"simbolo\"><img decoding=\"async\" src=\"https:\/\/www.inventable.eu\/IT\/media\/OhmLawCalculator\/I_symbol_low.png\"><\/td> \r\n\t\t<td>Corriente<BR>\r\n\t\t\t<input type=\"text\" id= \"txtCorriente\" name=\"corriente\" value=\"\"  style=\"width: 100px\" >\r\n\t\t\t<select id=\"cmbCorriente\">\r\n\t\t\t\t<option>A\r\n\t\t\t\t<option>mA\r\n\t\t\t<\/select>\r\n\t\t<\/td>\r\n\t<\/tr>\t\t\r\n\t\r\n\t<tr>\r\n\t\t<td class=\"simbolo\"><img decoding=\"async\" src=\"https:\/\/www.inventable.eu\/IT\/media\/OhmLawCalculator\/R_symbol_low.png\"><\/td> \r\n\t\t<td>Resistencia<BR>\r\n\t\t\t<input type=\"text\" id= \"txtResistencia\" name=\"resistencia\" value=\"\"  style=\"width: 100px\" >\r\n\t\t\t<select id=\"cmbResistencia\">\r\n\t\t\t\t<option>&#937;\r\n\t\t\t\t<option>K&#937;\r\n\t\t\t\t<option>M&#937;\r\n\t\t\t<\/select>\r\n\t\t<\/td>\r\n\t<\/tr>\t\t\t\t\t\t\r\n\t\r\n\t<tr>\r\n\t\t<td class=\"simbolo\"><img decoding=\"async\" src=\"https:\/\/www.inventable.eu\/IT\/media\/OhmLawCalculator\/P_symbol_low.png\"><\/td> \r\n\t\t<td>Potencia<BR>\r\n\t\t\t<input type=\"text\" id= \"txtPotencia\" name=\"potencia\" value=\"\"  style=\"width: 100px\" >\r\n\t\t\t<select id=\"cmbPotencia\">\r\n\t\t\t\t<option>W\r\n\t\t\t\t<option>mW\r\n\t\t\t\t<option>KW\r\n\t\t\t<\/select>\r\n\t\t<\/td>\r\n\t<\/tr>\r\n\t\r\n\t<tr>\r\n\t\t<td class=\"simbolo\">\r\n\t\t\t<input type=\"image\" src=\"https:\/\/www.inventable.eu\/IT\/media\/OhmLawCalculator\/clear.png\" border=\u201d0\u2033 onclick=\"ClearData()\"\/>\t\r\n\t\t<\/td>\r\n\t\t\r\n\t\t<td>\r\n\t\t\t<input type=\"image\" src=\"https:\/\/www.inventable.eu\/IT\/media\/OhmLawCalculator\/calc.png\" border=\u201d0\u2033 onclick=\"CalcFormula()\"\/>\t\r\n\t\t<\/td>\t\t\t\t\r\n\t<\/tr>\t\t\t\r\n<\/table>\r\n<\/div><\/p>\n<p>Il programma di questa pagina permette di calcolare la tensione, la corrente, la resistenza e la potenza in un circuito elettrico, conoscendo soltanto due di questi parametri, grazie alla Legge di Ohm e alle sue formule derivate.<\/p>\n<p>Per usarlo, scrivete i due parametri conosciuti nelle rispettive caselle di testo e premette il tasto &#8220;CALC&#8221;. Il programma far\u00e0 il calcolo e visualizzer\u00e0 i dati ottenuti nelle caselle restanti. Per effettuare un altro calcolo premete prima il tasto &#8220;C&#8221; (clear).<\/p>\n<p>A fianco di ogni casella c&#8217;\u00e8 una &#8220;combo&#8221; che permette di lavorare con multipli e sottomultipli (milli, kilo, Mega, ecc.).<\/p>\n<h3>Formule usate per effettuare i calcoli<\/h3>\n<div id=\"attachment_49\" style=\"width: 308px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-49\" class=\"size-full wp-image-49\" src=\"https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/Formule_I.png\" alt=\"Formule per ottenere la corrente (I)\" width=\"298\" height=\"91\" \/><p id=\"caption-attachment-49\" class=\"wp-caption-text\">Formule per ottenere la corrente (I)<\/p><\/div>\n<div id=\"attachment_50\" style=\"width: 308px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-50\" class=\"size-full wp-image-50\" src=\"https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/Formule_V.png\" alt=\"Formule per ottenere la tensione (V)\" width=\"298\" height=\"91\" \/><p id=\"caption-attachment-50\" class=\"wp-caption-text\">Formule per ottenere la tensione (V)<\/p><\/div>\n<div id=\"attachment_48\" style=\"width: 308px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-48\" class=\"size-full wp-image-48\" src=\"https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/Formule_R.png\" alt=\"Formule per ottenere la resistenza (R)\" width=\"298\" height=\"91\" \/><p id=\"caption-attachment-48\" class=\"wp-caption-text\">Formule per ottenere la resistenza (R)<\/p><\/div>\n<div id=\"attachment_47\" style=\"width: 308px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-47\" class=\"size-full wp-image-47\" src=\"https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/Formule_P.png\" alt=\"Formule per ottenere la potenza (P)\" width=\"298\" height=\"92\" \/><p id=\"caption-attachment-47\" class=\"wp-caption-text\">Formule per ottenere la potenza (P)<\/p><\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54 size-medium\" src=\"https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/inventable_it_eu-300x57.png\" alt=\"inventable.it versione italiana di inventable.eu\" width=\"300\" height=\"57\" srcset=\"https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/inventable_it_eu-300x57.png 300w, https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/inventable_it_eu-1024x195.png 1024w, https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/inventable_it_eu-768x146.png 768w, https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/inventable_it_eu-973x185.png 973w, https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/inventable_it_eu-508x97.png 508w, https:\/\/www.inventable.eu\/IT\/wp-content\/uploads\/2023\/05\/inventable_it_eu.png 1488w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>\r\n\r\n<p style=\"text-align: center;\">I contenuti di questa pagina sono originali, con licencia <a href=\"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/it\/deed.it\">Creative Commons BY_NC_ND<\/a><\/p>\r\n<a href=\"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/it\/deed.it\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.inventable.eu\/media\/General\/cc_by_nc_nd.png\" alt=\"\" width=\"140\" height=\"50\" \/><\/a><\/p>\n<div class=\"mceTemp\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Calcolatore on-line che permette di calcolare la tensione, la corrente, la resistenza e la potenza di un circuito elettrico, attraverso la Legge di Ohm.<\/p>\n","protected":false},"author":1,"featured_media":51,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[15],"class_list":["post-45","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-calcolatori","tag-legge-di-ohm"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Legge di Ohm: calcolatore on-line -<\/title>\n<meta name=\"description\" content=\"Calcolatore on-line che permette di calcolare la tensione, la corrente, la resistenza e la potenza di un circuito elettrico.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.inventable.eu\/IT\/legge-di-ohm-calcolatore-on-line\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta 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