
Darbas, Energija, Galia
Authored by Greta Vyšniauskienė
Physics
9th Grade
Used 2+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Kokį darbą per 2 s atlieka elektros srovė, kurios stipris – 2 A, kai šaltinio gnybtų įtampa – 4,5 V?
18 J.
12 J.
9 J.
4,5 J.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
12 V įtampos automobilio lempa teka 3,5 A srovė. Kokia srovės galia?
70 W.
4,5 W.
48 W.
42 W.
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Šiuolaikinių LED technologijos televizorių vidutiniška vartojama galia yra 50 W. Kokio stiprio srovė teka televizoriaus grandine, kai jis įjungtas į elektros tinklą?
50 A.
10 A.
0,23 A.
0,5 A.
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Trys šildymo elementai, kurių varžos R, 2R ir 3R, sujungti nuosekliai. Kuriame elemente per tą patį laiką išsiskirs daugiausia šilumos?
Elemente, kurio varža R.
Elemente, kurio varža 2R.
Elemente, kurio varža 3R.
Visuose elementuose išsiskirs tiek pat šilumos.
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Paveiksle pavaizduota grandinė, kurioje įjungtos trys vienodos galios lemputės. Palyginkite lempų įkaitimą, jei jos apskaičiuotos vienodai įtampai.
Visos lemputės švies vienodai.
L3 ir L2 švies blankiau nei L1, nes srovė jomis tekės silpnesnė.
L3 ir L1 švies ryškiau nei L2, nes srovė jomis tekės stipresnė.
L3 ir L2 švies ryškiau nei L1, nes srovė jomis tekės stipresnė.
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Elektrinio prietaiso gnybtuose įtampa lygi U, juo teka I stiprio srovė, o naudojama galia yra:
UIt.
IR.
UI.
U/I.
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Kiek džaulių atitinka 1 Wh?
36 000 J.
360 J.
3600 J.
36 J.
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