electrican question series/parallel circuit

[pyro]

can anyone help me figure this out, im trying to figure out how you find the current and voltage for the the R values, when ur only givin the resistance values and voltage total. thanx

[INITIALD]

I think you find RT=R1+R2+R3+R4+R5 first.
Then for voltage of each R value i think you do VR1=R1/RT
and for current i think its I=V/R

[pyro]

ya i did that and found out my RT to be 60 ohms and then i found the current total to be 2 A. i just dont know how to get the voltage and current for the R values

[INITIALD]

Try the voltage divider rule to get the voltage. VR1=R1/RT*VT
I have no idea about the current, if you find out let me know.

[pyro]

awesome thanx, to find out the current u just go I=E/R

[INITIALD]

Whats E??

[pyro]

voltage

[INITIALD]

Oh im used to seeing I=V/R

[pyro]

ya I=V/R is the correct way. i just got in the habbit of doin it the other way, once again thnx for the help i have a test tommorow and that was basically the only thing i couldent figure out

[INITIALD]

Originally posted by pyro
ya I=V/R is the correct way. i just got in the habbit of doin it the other way, once again thnx for the help i have a test tommorow and that was basically the only thing i couldent figure out

No problem man

[Weed]

RT isn't 60 ohm its 30.

RT=R5//(R1+((R2+R3)//R4))

// means they are in parallel.

R2+R3=60ohm
60//R4=15 ohm
15+R1=45ohm
R5//45=30ohm
RT=30ohm

VR1=160V
Vr2=26.6V
VR3=53.33V
VR4=80V
VR5=240V

Been awhile since I worked on parallel series circuit but pretty sure thats what it is.

[funkytuqe]

weed is corect, that is a series parallel circuit.

[redx2nv]

power is p=ei in watts

[danno]

yea i'll second what weed said. he's right that's what i got too. thanks for the little challange i'll have to remember that for when i go back to sait. good luck

[pyro]

alright i have some more problems. for the first one i need to find the voltage drops across each lamp. thanx

[pyro]

all the lamp resistance are the same. need to find the voltage drop across the lamps

[danno]

i'm confused on what your asking. the second one you have 1and2 in parallel with 3 in parrallel with 4and 5.
so 1 and 2 in series, and 4 and 5 in series.
the first one says what the voltage is. and the second doesn't have a resistance.

[pyro]

ya i was really confused with these schematics i really have no idea whats going on. im just supposed to find the voltage drop across each lamp when the source voltage is 120 and all the lamps have a resistance of 240 ohms.

[danno]

i forget how to do the first one.... i'll work on it i'll see if i can figure it out. by that time it will be too late. i know i did it before i just can't remember but i don't feel like doing it now that it's late sorry.

[pyro]

thats alright, thanx anyways