Question

Formulas for Q3?
"For the last two parts assume I = 2A"
Also, formulas for Q6 please :)

Answer 1

q6 the formula
1-Vo* (R3-(B*R1*R3)+R1+R2+A*R2)/(R3-B*R1*R3)=VIN
2-i1=V0/(R3-B*R1*R3)
3- vo = vth
but i don't know the RTH

Answer 2

Rth plzzzz

Answer 3

Thank you Sara! I'm still missing Rth formula, and the 2nd part of Q3 ones...

Answer 4

When I=2 v1 is 1,32 and v2 is 0,66

Answer 5

Thank you zozi, but that seems to be wrong:c

Answer 6

what formulas did you use?
My Resistances are 1ohm

Answer 7

just valculating v1, one 1 ohm and two serial resistors in paralel means a 0,66ohm resistor. From this U=I*R for v1 and for v0 its a half divider from two one ohm resistor...

Answer 8

sara do you mean I1= vin/(r3-b*r1*r3
vo=vin*(r3-(b*r1*r3)+r1+r2+a*r2)/(r3-b*r1*r3)

Answer 9

q6

Answer 10

Q6 Rth please Vin=18V, R1=1.5Ω, R2=3Ω, R3=4Ω, A=1.5 and B=0.5.

Answer 11

como vc fez o Q3, Joao?

Answer 12

eu achei aki as respostas para o meu

Answer 13

Thank you once again zozi, it was v0= 0.666 and v1=1.32, it was the other way around
Also, for you Joao Vitor, RTH = 3.6

Answer 14

jones what the formula for q6

Answer 15

are you sure abt that, Jone133?

Answer 16

Yes, for I=2A on Q3 and for the values of JoaoMC on Q6

Answer 17

THANK YOU SOO MUCH!!

Answer 18

RTH= Vth / ISC
Isc= Current on short circuit

Answer 19

I1
Vo
Vth
Rth

Answer 20

but how did you calculate the Rth ???

Answer 21

Finally 100% \o/

Answer 22

congrats! It's a great accomplishment, I hope I get 100% too on the final :D

Answer 23

formula please jones...

Answer 24

Hey Jone133.. my values are: 10A and -3A for v0 and 5A for v1 and v0

Answer 25

Dá uma força com o 6 aí, joao?? =D

Answer 26

I don't have formulas, sorry... I Only know that RTH = VTH / Isc and Isc is the current on short circuit. Zizo told me the values for Q3.

Answer 27

mc congrats q6 whats the formula

Answer 28

para os valores de JoaoMC, Vo, I and Vth are 1.8
The formulas are on the 1st answer

Answer 29

ok I1 and vo

Answer 30

also, vo = vth

Answer 31

Q6: Vin=18V, R1=1.5Ω, R2=3Ω, R3=4Ω, A=1.5 and B=0.5.

1.8
1.8
1.8
3.6

Answer 32

but still no formulas...

Answer 33

For Q3 v0= 0,66*I/2 but if its over +/- 2V the zener cuts it to +/-2V
(found zizo's answer on another question)

Answer 34

Thank you Zozi!

Answer 35

and v1 is 0,66*I

Answer 36

JoãoVitorMC u is the mannn thank u

Answer 37

welcome :)

Answer 38

i will post soon a topic here about solve all the Question 3 and others that i complete understant.

Answer 39

Eu vi que teu Rth deu o dobro do teu Vth.. posso assumir isso pro meu, será? meu vth tá em 7.5

Answer 40

acho melhor não arriscar não

Answer 41

espera até amanha, deve aparecer mais soluções

Answer 42

agora q acabei aki, vou trabalhar em como encontrar as respostas e irei postar aki o mais rapido possivel

Answer 43

Q3: p1 : zener voltage sholud be less than the given current so vo=2V which is zener voltage
Q3: P2 : I1=( 0.66 * I ) . . . also find I2 = (0.33 * I) .. . Vo= I2
Q3: P3 : (a) I1=( 0.66 * I ) . . . also find I2 = (0.33 * I) .. . Vo= I2 . . (b) v1 = I1

Answer 44

what is Isc in Q6

Answer 45

Question 3 explained: http://openstudy.com/study#/updates/5089d2f4e4b077c2ef2e01ca

Answer 46

Rth help plzzz

Answer 47

if you assume I=2A then the current through the parallel resistor will be 1.3333 A ant V1 will be(1ohm*1.333) 1.333V the remaining current flows through the zener diode its resistance will be 1ohm so v0 will be 0.667v

Answer 48

anyone qno 4 part first equation????