pisana provjera znanja izmjenične struje

pisana provjera znanja izmjenične struje

KG

15 Qs

quiz-placeholder

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pisana provjera znanja izmjenične struje

pisana provjera znanja izmjenične struje

Assessment

Quiz

Education, Physics, Other

KG

Practice Problem

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Created by

Petar Orlović

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Izmjenična struja nastaje:

Okretanjem vodiča u magnetskom polju

Okretanjem magnetskog polja oko vodiča

2.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Frekvencija se računa prema obrascu:

1T\frac{1}{T}

1t\frac{1}{t}

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Formula za efektivnu vrijednost izmjenične struje je:

Ief=Im2Ief=\frac{Im}{\sqrt{2}}

Ief=Im2I_{ef}=\frac{Im}{2}

Im2Im\cdot\sqrt{2}

Im3\frac{Im}{\sqrt{3}}

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

U slučaju da nam je poznata efektivna vrijednost trenutni napon računamo po formuli:

2Uefcosωt\sqrt{2}\cdot Uef\cdot\cos\omega t

2Uefsinωt\sqrt{2}\cdot Uef\cdot\sin\omega t

Uef3cosωt\frac{Uef}{\sqrt{3}}\cdot\cos\omega t

3Uefsin(ωt)\sqrt{3}\cdot Uef\cdot\sin\left(\omega t\right)

5.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

U čistom radnom otporu koji se postotak energije pretvoru u toplinsku?

50%

90%

100%

0%

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Formula za induktivni otpor je:

XL=1ωLX_L=\frac{1}{\omega L}

XL=ωLX_L=\omega L

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Formula za kapacitivni otpor je:

Xc=ωCX_c=\omega C

XC=1ωCX_C=\frac{1}{\omega C}

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