Question

1,2 si 3
Dau Coroana
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Answer 1

Răspuns:

☕SALUT!☕

Se da:

1.U-12w

P-21w

I-?

Rezolvare:

P=U*I

I=P/U

Calcule:

I=21/12=1,75A

2.Se da:

I=10kA =10000A

U=20MV=20 000000V.

t=0,1s

Calcule:

W=U*I*t=2*10^6*10⁴*0,1=2*10^9J=2000Mj

P-U*I=20000Mw.

3.Se da:

P=100W

U=200V

I=?

Calcule:

I=P/U=100/200=0,45A