{"id":3957,"date":"2022-06-01T07:58:46","date_gmt":"2022-06-01T07:58:46","guid":{"rendered":"https:\/\/mdr.foobrdigital.com\/?p=3957"},"modified":"2022-06-01T07:58:46","modified_gmt":"2022-06-01T07:58:46","slug":"electric-power-efficiency","status":"publish","type":"post","link":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/2022\/06\/01\/electric-power-efficiency\/","title":{"rendered":"Electric Power Efficiency"},"content":{"rendered":"\n

Power efficiency<\/h3>\n\n\n\n

Power efficiency is defined as the ratio of the output power<\/a> divided by the input power:<\/p>\n\n\n\n

\u03b7<\/em> = 100% \u22c5 Pout<\/sub><\/em> \/ P<\/em>in<\/em><\/sub><\/p>\n\n\n\n

\u03b7 is the efficiency in percent (%).<\/p>\n\n\n\n

Pin<\/sub> is the input power consumption in watts<\/a> (W).<\/p>\n\n\n\n

Pout<\/sub> is the output power or actual work in watts (W).<\/p>\n\n\n\n

Example<\/h5>\n\n\n\n

Electric motor has input power consumption of 50 watts.<\/p>\n\n\n\n

The motor was activated for 60 seconds and produced work of 2970 joules.<\/p>\n\n\n\n

Find the efficiency of the motor.<\/p>\n\n\n\n

Solution:<\/p>\n\n\n\n

Pin<\/sub><\/em> = 50W<\/p>\n\n\n\n

E<\/em> = 2970J<\/p>\n\n\n\n

t<\/em> = 60s<\/p>\n\n\n\n

Pout<\/sub><\/em> = E<\/em> \/ t<\/em>  = 2970J \/ 60s = 49.5W<\/p>\n\n\n\n

\u03b7 = 100% * Pout<\/sub><\/em> \/ Pin<\/sub><\/em> = 100 * 49.5W \/ 50W = 99%<\/p>\n\n\n\n

Energy efficiency<\/strong><\/h3>\n\n\n\n

Energy efficiency is defined as the ratio of the output energy divided by the input energy:<\/p>\n\n\n\n

\u03b7<\/em> = 100% \u22c5 Eout<\/sub><\/em> \/ E<\/em>in<\/em><\/sub><\/p>\n\n\n\n

\u03b7 is the efficiency in percent (%).<\/p>\n\n\n\n

Ein<\/sub> is the input energy consumed in joule (J).<\/p>\n\n\n\n

Eout<\/sub> is the output energy or actual work in joule (J).<\/p>\n\n\n\n

 <\/h5>\n\n\n\n
Example<\/h5>\n\n\n\n

Light bulb has input power consumption of 50 watts.<\/p>\n\n\n\n

The light bulb was activated for 60 seconds and produced heat of 2400 joules.<\/p>\n\n\n\n

Find the efficiency of the light bulb.<\/p>\n\n\n\n

Solution:<\/p>\n\n\n\n

Pin<\/sub><\/em> = 50W<\/p>\n\n\n\n

Eheat<\/sub><\/em> = 2400J<\/p>\n\n\n\n

t<\/em> = 60s<\/p>\n\n\n\n

Ein<\/sub> = Pin<\/sub> * t = <\/em>50W * 60s = 3000J<\/p>\n\n\n\n

Since the light bulb should produce light and not heat:<\/p>\n\n\n\n

Eout<\/sub> <\/em>= Ein <\/sub>– <\/sub>Eheat <\/sub><\/em>= 3000J – 2400J = 600J<\/p>\n\n\n\n

\u03b7 = 100 * Eout<\/sub><\/em> \/ Ein<\/sub><\/em> = 100% * 600J \/ 3000J = 20%<\/p>\n","protected":false},"excerpt":{"rendered":"

Power efficiency Power efficiency is defined as the ratio of the output power divided by the input power: \u03b7 = 100% \u22c5 Pout \/ Pin \u03b7 is the efficiency in percent (%). Pin is the input power consumption in watts (W). Pout is the output power or actual work in watts (W). Example Electric motor has input power consumption of 50 watts. The motor was […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[258],"tags":[],"_links":{"self":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/3957"}],"collection":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/comments?post=3957"}],"version-history":[{"count":0,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/3957\/revisions"}],"wp:attachment":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/media?parent=3957"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/categories?post=3957"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/tags?post=3957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}