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ID number:372084
 
Author:
Evaluation:
Published: 21.02.2009.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Dar­ba uz­de­vums: no­skaid­rot lie­lu­mus, kas no­sa­ka vai trans­for­ma­tors dar­bo­jas kā sprie­gu­ma pa­aug­sti­nošs vai pa­ze­mi­nošs fak­tors.

Dar­ba pa­ma­to­jums: maiņ­strā­va ir po­pu­lā­ra tā ie­mes­la dēļ, ka var vieg­li mai­nīt sprie­gu­mu. Un va­ja­dzī­gi vis­da­žā­dā­kie sprie­gu­mi, tā, pie­mē­ram, ra­dio­apa­rā­tā lam­pu kvē­li­nā­ša­nai va­ja­dzīgs sprie­gums 6V, starp ra­dio­lam­pu ka­to­du un ano­du 350V, bet tīk­la sprie­gums ir 220V. Res­pek­tī­vi va­ja­dzī­ga ie­kār­ta, kas spē­tu di­fe­ren­cēt pie­va­dī­to tīk­la sprie­gu­mu. Maiņ­sprie­gu­ma mai­nī­ša­nai var iz­man­tot elek­tro­mag­nē­tis­kās in­duk­ci­jas pa­rā­dī­bu.…

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