Question

Ma puteti ajuta cu aceasta problema urgent este pentru nota,am rezolvat eu ceva din ea si m am incurcat de acolo,mersiii

Answer 1

Se da:
R1=30ohm
R2=20ohm
E=90V
r=6ohm
a)I=?A
I1=?A
I2=?A
b)P1/P2=?
c)Pgen=?W
d)n=?

Formule:
a)I=E/(R+r)

1/R=(1/R1)+(1/R2)
1/R=(R1+R2)/R1*R2
R=R1*R2/(R1+R2)


I1*R1=I2*R2=I*R
I1=I*R/R1
I2=I*R/R2

b)P1=I1²*R1
P2=I2²*R2

P1/P2=(I1²*R1)/(I2²*R2)

c)Pgen=E*I

d)n=R/(R+r)

Calcule:
a)R=30*20/(30+20)=12ohm
I=90/(12+6)=5A
I1=5*12/30=2A
I2=5*12/20=3A

b)P1/P2=(2²*30)/(3²*20)=0,(6)

c)Pgen=90*5=450W

d)n=12/(12+6)=0,(6)