Question

Plz help!!! I have a midterm on monday and have no idea how to solve this.
I need help solving R2 and R3. We have to use only the concepts of circuits and can only use the formulas: V=IR and P=IV

Answer 1

have to see how the circuit is arranged. do you have a pic?

Answer 2

oh sorry ya i thought i put the picture. just a sec

Answer 3

if you cant see anything, just tell me and ill just write out the numbers

Answer 4

ok, so we need VIRP table, right?

Answer 5

i guess

Answer 6

oh, Vincent is here, let him help. Please @Vincent-Lyon.Fr

Answer 7

ok

Answer 8

for R2, you mark I =34A and V =40V , right?

Answer 9

no just 40 V the 34A goes through the whole section since it has to be divided among the other resistors.

Answer 10

right?

Answer 11

Please, post original picture with original given data. Don't put your stuff there.

Answer 12

R2 = 40V / 34A = 1.18Ω etc.

Answer 13

Totally different!!! they ask you to calculate equivalent R between R2 and R3, right?

Answer 14

and where is R6? do you mix 2 problems ? hahahaha

Answer 15

no. i just have to figure out the current and volts for each resistor and the battery with the given info. i had already figure everything out for all the resistors except R2 and R3

Answer 16

that was for the next problem. sorry. ok here is the data for this problem

Answer 17

sorry for the bad quality, im taking these with my ipod

Answer 18

wait @loser66 where did you go? i still need help

Answer 19

hey @Vincent-Lyon.Fr why did you divide 40V by 34A

Answer 20

this is a parallel circuit right? the current has to distributed amongst the resistors so all the current cant go to one resistor right?

Answer 21

R = V/I for a resistor.

Answer 22

yes but not all the 34A goes to R2 since it has to go to R3 as well right?

Answer 23

No, according to your picture 34 amps go through R2.

Answer 24

then how much goes through R3?

Answer 25

24? since 10 A would go to R4 and R5?

Answer 26

plz help i have a midterm on monday!

Answer 27

if you dont know how to solve it just say it so i can ask others

Answer 28

dont just leave. thats not nice. thx for staying loser66

Answer 29

I am trying, but not have the answer yet. I need it, too. hihihi

Answer 30

kk thx so much. i have the answers if you want but dont know how to solve it.

Answer 31

ok, just post. I need it, too.

Answer 32

kk. hold on.

Answer 33

Thanks for posting, let me try to find the logic on it.

Answer 34

no problem. the wierd thing is i have already solved it before with the right answers, but now i dont remembber how i did it. :( its so frustrating!!!1

Answer 35

Since Vbat = 60 V, then V1 = 60 V too because they are in parallel.
So I1 = 60/10 = 6A
So I2 = 40 - 6 = 34A

Since V3 = 20V, then V2 = V1 - V3 = 60 - 20 = 40 V
So R2 = 40/34 = 1.17 ohm

etc.

use additivity of currents at nodes and additivity of potential differences in series.
I must go.

Answer 36

ok thx.