Legile lui KIRCHHOFF Flashcards

1
Q

reteaua el

A

e un circ el mai coplicat cu mai multe ramificatii

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2
Q

ramurile det elem 3 de baza a retelei:

A

noduri
ramura (latura)
ochiul

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3
Q

nodul de retea

A

e pct de intanlire a cel putin 3 conductoare

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4
Q

ramura retelei

A

e portiunea de circ prinsa intre 2 noduri succesive

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5
Q

ochiul de retea

A

e conturul poligomar inchis, format din ramurile retelei el

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6
Q

LG I a lui Kirchhoff

A

se refera la noduri
ENUNT:
Suma inten curen el care intra intr un nod de retea e egala cu suma intensitatiilor care ies din nod

I1+I2+I5=I3+I4
I1+I2+I5-I3-I4=0

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7
Q

LG a II lui Kirchhoff

A

se ref la ochiul de retea
- se alege un sens de parcurgere pt intensitati
cu (+) daca coincide, cu (-) daca nu
- tensiunea electromot se ia cu (+) daca sensul e de la borna negativa la cea poz

ex. E2-E3-E4=-I1R1+I2R2-I3R3

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