The machines which are used to generate electrical voltages are called generators.\u00a0The generators which generate purely sinusoidal a.c. voltages are called alternators.
\nThe basic principle of an alternator is the principle of electromagnetic induction.\u00a0The sine wave is generated according to Faraday’s law of electromagnetic
\ninduction. It says that whenever there is a relative motion between the conductor\u00a0and the magnetic field in which it is kept, an e.m.f. gets induced in the conductor.
\nThe relative motion may exist because of movement of conductors with respect to\u00a0magnetic field or movement of magnetic field with respect to conductor.
\nLet a single turn coil be free to rotate at constant angular velocity symmetrically\u00a0between the poles of a magnet system.<\/p>\n
An e.m.f. is generated in the coil (from Faraday\u2019s Laws) which varies in magnitude\u00a0and reverses its direction at regular intervals. The reason for this is shown in
\nFigure(in next page). In positions (a), (e) and (i) the conductors of the loop are\u00a0effectively moving along the magnetic field, no flux is cut and hence no e.m.f. is
\ninduced. In position (c) maximum flux is cut and hence maximum e.m.f. is induced.\u00a0In position (g), maximum flux is cut and hence maximum e.m.f. is again induced.
\nHowever, using Fleming\u2019s right- -and rule, the induced e.m.f. is in the opposite\u00a0direction to that in position (c) and is thus shown as -E. In positions (b), (d), (f) and
\n(h) some flux is cut and hence some e.m.f. is inuced. If all such positions of the\u00a0coil are considered, in one revolution of the coil, one rycle of alternating e.m.f. is
\nproduced as shown. This is the principle of operation of the a.c. generator (i.e. the\u00a0alternator).<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Production of AC Voltage The machines which are used to generate electrical voltages are called generators.\u00a0The generators which generate purely sinusoidal a.c. voltages are called alternators. The basic principle of an alternator is the principle of electromagnetic induction.\u00a0The sine wave is generated according to Faraday’s law of electromagnetic induction. It says that whenever there is … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":""},"categories":[4773],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/28675"}],"collection":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/comments?post=28675"}],"version-history":[{"count":0,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/28675\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/media?parent=28675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/categories?post=28675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/tags?post=28675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}