{"id":1711,"date":"2015-12-31T02:58:04","date_gmt":"2015-12-31T02:58:04","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=1711"},"modified":"2024-11-08T13:16:23","modified_gmt":"2024-11-08T13:16:23","slug":"potencia-eletrica-energia-eletrica","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/eletricidade\/eletrodinamica\/potencia-eletrica-energia-eletrica\/","title":{"rendered":"Pot\u00eancia el\u00e9trica \u2013 Energia el\u00e9trica EN"},"content":{"rendered":"

ELECTRICAL POWER \u2013 ELECTRICAL ENERGY<\/span><\/h1>\n
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Electrical power \u2013 Electrical energy<\/span><\/b><\/p>\n

Energy<\/span><\/b><\/p>\n

\"\"\u00a0Typically,\u00a0<\/span><\/b>the\u00a0<\/span><\/b>concept and use\u00a0<\/span><\/b>of the word\u00a0<\/span><\/b>energy\u00a0<\/span><\/b>refers to the\u00a0<\/span><\/b>ability to perform work or perform an action.\u00a0<\/span><\/b>It can take several forms: potential, mechanical, chemical, electromagnetic, electrical, thermal, etc.<\/span><\/b><\/p>\n

The\u00a0<\/span><\/b>term energy\u00a0<\/span><\/b>can also designate\u00a0<\/span><\/b>reactions due to a certain form of work\u00a0<\/span><\/b>, for example,\u00a0<\/span><\/b>heat, mechanical work (movement) or light\u00a0<\/span><\/b>.<\/span><\/b><\/p>\n

These can be\u00a0<\/span><\/b>carried out by an inanimate source\u00a0<\/span><\/b>(e.g. engine, boiler, refrigerator, speaker, lamp, shower, fan) or by a\u00a0<\/span><\/b>living organism such\u00a0<\/span><\/b>as muscles, biological energy, etc.<\/span><\/b><\/p>\n

Electric\u00a0<\/b>energy<\/span><\/b><\/p>\n

\"\"\u00a0Electrical energy or electricity\u00a0<\/span><\/b>is the name given to\u00a0<\/b>phenomena involving electrical charges.<\/b><\/span>\u00a0\"\"<\/b><\/b><\/p>\n

All\u00a0<\/span><\/b>electrical appliances require electrical energy to operate.<\/span><\/b><\/b><\/p>\n

When\u00a0<\/span><\/b>they receive this energy\u00a0<\/span><\/b>, they\u00a0<\/span><\/b>transform it into another form of energy.\u00a0<\/span><\/b>Thus, a\u00a0<\/span><\/b>fan transforms electrical energy into mechanical energy and thermal energy\u00a0<\/span><\/b>; a\u00a0<\/span><\/b>filament bulb<\/span><\/b><\/b><\/p>\n

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transforms electrical energy into light and thermal energy\u00a0<\/span><\/b>; an\u00a0<\/span><\/b>electric shower transforms electrical energy into thermal energy, etc.<\/span><\/b><\/p>\n

Electrical power<\/span><\/b><\/p>\n

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\"\"\u00a0The greater the amount of energy transformed in a given unit of time,\u00a0<\/span><\/b>the greater the power of the device.\u00a0<\/b>Therefore,\u00a0<\/b>electrical power is a quantity that measures the speed\u00a0<\/b>at which\u00a0<\/b>electrical energy is transformed into another (or other) form of energy\u00a0<\/b>, in a given\u00a0<\/b>unit of time.<\/b><\/span><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/p>\n

<\/b>Electrical power ( Po<\/span><\/b><\/sub>\u00a0)\u00a0<\/span><\/b>is defined\u00a0<\/b><\/span>as the\u00a0<\/span><\/b>ratio between the electrical energy transformed or transferred (W) and the time interval (\u0394t) of this transformation.<\/span><\/b><\/p>\n

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Note in the expression above\u00a0<\/span><\/b>that\u00a0<\/span><\/b>the greater the power of a device, the greater the amount of energy dissipated by it.<\/span><\/b><\/p>\n

Relationship between electrical power (P\u00a0<\/span><\/b>o<\/span><\/b><\/sub>\u00a0), electrical current (i) and potential difference, voltage or strain U<\/span><\/b><\/p>\n

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Electricity consumption (W)<\/span><\/b><\/p>\n

\u00a0The\u00a0<\/span><\/b><\/span>joule (J) is\u00a0<\/span><\/b><\/span>a\u00a0<\/span><\/b><\/span>very small unit of electrical energy\u00a0<\/span><\/b><\/span>, used to measure the\u00a0<\/span><\/b><\/span>electrical\u00a0<\/b><\/span><\/span>energy consumption\u00a0<\/span><\/b><\/span>of homes, buildings, factories, etc.<\/b><\/span><\/span><\/b><\/b><\/b><\/p>\n

Since this measurement, in\u00a0<\/span><\/b><\/span>joules (J) is expressed by a very large number\u00a0<\/span><\/b><\/span>, in\u00a0<\/span><\/b><\/span>practice the\u00a0<\/span><\/b><\/span>kilowatt-hour (kWh)\u00a0<\/b><\/span><\/span>is used ,\u00a0<\/span><\/b><\/span>whose relationship\u00a0<\/b><\/span>with the joule is as follows\u00a0<\/b><\/span>\u00a0 W = P\u00a0<\/b><\/span>o<\/b><\/span><\/sub>\u00a0.\u0394t\u00a0<\/b><\/span>1kWh =<\/b><\/span><\/span><\/b><\/b><\/b>\u00a0\u00a0\"\"<\/b><\/span><\/b><\/b><\/b>\u00a0\u00a0\"\"<\/b><\/span><\/p>\n

1000W.1h = 1,000W.3,600s\u00a0\u00a0<\/span>\"\"\u00a0<\/b><\/span>1kWh = 3.6.106\u00a0<\/b><\/span>J<\/b><\/span><\/sup>\u00a01 kW.h is the amount of energy dissipated by an electrical appliance with a nominal power of 1,000 Watts, operating for one hour\u00a0<\/b>.<\/b><\/span><\/span>\u00a0<\/b><\/span><\/b><\/b><\/b>\u00a0\u00a0\"\"\u00a0\u00a0<\/b><\/span><\/b><\/p>\n

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<\/b>Electricity meters\u00a0<\/span><\/b>and\u00a0<\/b><\/span>their\u00a0<\/span><\/b>respective consumption are expressed in kWh.<\/span><\/b><\/p>\n

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What you should know, information and tips<\/span><\/b><\/p>\n

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\"\"\u00a01kWh = 3.6.106\u00a0<\/span><\/b><\/span>J<\/span><\/b><\/span><\/sup>\u00a01<\/span><\/b><\/span>\u00a0kW.h\u00a0<\/b>is the\u00a0<\/b>amount of energy dissipated\u00a0<\/b>by an electrical appliance with a\u00a0<\/b>nominal power of 1,000 Watts, operating for one hour (3,600s).<\/b><\/span>\u00a0\u00a0\"\"\u00a0\u00a0<\/b><\/span><\/b><\/b><\/b><\/b><\/b><\/p>\n

\"\"\u00a0An\u00a0<\/span><\/b>incandescent\u00a0<\/b><\/span>lamp\u00a0 with P\u00a0<\/span><\/b>o<\/b><\/sub>\u00a0= 100 W\u00a0<\/b>\u00a0and U = 127 V\u00a0<\/b>has the\u00a0<\/b>same brightness\u00a0<\/b>as a\u00a0<\/b>\u00a0fluorescent\u00a0<\/b>lamp with P\u00a0<\/b>o<\/b><\/sub>\u00a0= 25 W\u00a0<\/b>\u00a0and U = 127 V,\u00a0<\/b>but the\u00a0<\/b>P\u00a0<\/b>o<\/b><\/sub>\u00a0= 25 W lamp dissipates\u00a0<\/b>less power\u00a0<\/b>\u00a0and consequently\u00a0\u00a0<\/b>consumes less electrical energy.<\/b><\/span><\/b><\/b><\/b><\/b><\/b>\u00a0<\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/b><\/p>\n

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All\u00a0<\/span><\/b>packaging must include:\u00a0<\/span><\/b>Manufacturer’s brand, power (W), voltage (V), efficiency (in<\/b><\/span><\/b><\/b><\/p>\n

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lumens per Watts (lm\/W)\u00a0<\/span><\/b>and effective current (A).<\/b><\/span><\/b><\/b><\/p>\n

Check out the exercises<\/span><\/a><\/h3>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

ELECTRICAL POWER \u2013 ELECTRICAL ENERGY Electrical power \u2013 Electrical energy Energy \u00a0Typically,\u00a0the\u00a0concept and use\u00a0of the word\u00a0energy\u00a0refers to the\u00a0ability to perform work or perform an action.\u00a0It can take several forms: potential, mechanical, chemical, electromagnetic, electrical, thermal, etc. The\u00a0term energy\u00a0can also designate\u00a0reactions due to a certain form of work\u00a0, for example,\u00a0heat, mechanical work (movement) or light\u00a0. These can be\u00a0carried out by an<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1676,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-1711","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1711","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/comments?post=1711"}],"version-history":[{"count":4,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1711\/revisions"}],"predecessor-version":[{"id":11321,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1711\/revisions\/11321"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1676"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=1711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}