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    Electric HELP!!

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    Ahmed
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    Electric HELP!!

    Post by Ahmed on Tue Dec 09, 2008 7:57 pm

    This is my last hope...

    In a series parallel circuit how do you find the voltage drop across a branch...this is urgent help!!!


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    Re: Electric HELP!!

    Post by Steve on Tue Dec 09, 2008 8:03 pm

    use a Voltmeter?
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    Re: Electric HELP!!

    Post by Ahmed on Tue Dec 09, 2008 8:19 pm

    No, I mean by pictures. this is basically the question:



    Please tell me the how to find the voltage of R6


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    Re: Electric HELP!!

    Post by Steve on Tue Dec 09, 2008 9:09 pm

    does the voltage half at every break off?, but the voltage would increase where r9 rejoins
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    Re: Electric HELP!!

    Post by Ahmed on Tue Dec 09, 2008 9:16 pm

    I wish I could burn this question -___-
    ==============
    All I know is that in a parallel circuit the voltage across parallel branches are the same.

    And no it does not half at every branch...

    The voltage doesn't neccessarly have a pattern other than at the end they must equal the total voltage (which is 60V).


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    Re: Electric HELP!!

    Post by Steve on Tue Dec 09, 2008 9:21 pm

    if all the paralels are the same then wouldn't r6 be 15?

    if the r1 r3 r4 r5 were worth 15 then then the circuit would end with 60v and to get to r5 the volts have to go through r6 :S
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    Re: Electric HELP!!

    Post by Ahmed on Tue Dec 09, 2008 9:27 pm

    But the problem is tha they are not all parallel, its paral and series

    This is the correct notation:

    R1||(R2+R3||[(R8+R9)||R7+R5||(R4+R6)])

    ** "||" =the parallel sign


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    Re: Electric HELP!!

    Post by Doc on Wed Dec 10, 2008 1:46 am

    I swear some ppl were doing this in physics ...
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    Re: Electric HELP!!

    Post by Hassan on Wed Dec 10, 2008 2:13 am

    I am really sorry bro I can not help with this one. Have not taken physics for like at least 4 years....Good Luck in finding the answer.


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    Re: Electric HELP!!

    Post by Ahmed on Wed Dec 10, 2008 1:11 pm

    The problem is that this isn't physics, this is electricity. SCREW IT!!!


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    Re: Electric HELP!!

    Post by Doc on Wed Dec 10, 2008 8:54 pm

    Hassan wrote:I am really sorry bro I can not help with this one. Have not taken physics for like at least 4 years....Good Luck in finding the answer.

    9.8m^2
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    Re: Electric HELP!!

    Post by Ahmed on Wed Dec 10, 2008 9:50 pm

    Sayf, what?


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    Re: Electric HELP!!

    Post by wilku_88 on Thu Dec 11, 2008 1:40 pm

    UR6= Ucc * R6 / (R4+R6+R7) and the Ucc is the battery voltage... simply voltage divisor Wink
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    Re: Electric HELP!!

    Post by Doc on Thu Dec 11, 2008 4:13 pm

    Ahmed IV wrote:Sayf, what?

    lol nothing ...
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    Re: Electric HELP!!

    Post by Ahmed on Fri Dec 12, 2008 9:53 pm

    wilku_88 wrote:UR6= Ucc * R6 / (R4+R6+R7) and the Ucc is the battery voltage... simply voltage divisor Wink

    Well I got it wrong Sad (and so did the whole class)

    The answer is 12.1 V

    I put 10.6V

    Wilku I did it your way, and you get 20V, doing it your way, so its also wrong slanty


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    Re: Electric HELP!!

    Post by wilku_88 on Sat Dec 13, 2008 7:18 am

    Did you have value of resistor's and battery voltage?
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    Re: Electric HELP!!

    Post by Ahmed on Sat Dec 13, 2008 4:55 pm

    Yes:

    R4=1000 ohms
    R5=560 ohms
    R6=1000 ohms
    R7=1000 ohms

    Total Voltage=60 Volts


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    Re: Electric HELP!!

    Post by wilku_88 on Sun Dec 14, 2008 8:57 am

    There is one dot missed on that cicuit diagram Wink now the answer is:

    I think the answer is good Very Happy
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    Re: Electric HELP!!

    Post by Ahmed on Sun Dec 14, 2008 2:42 pm

    Wait Razz

    What is the answer exactly, I am lost :scratch:


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    Re: Electric HELP!!

    Post by wilku_88 on Sun Dec 14, 2008 3:04 pm

    Answer is UR6 on the right side of the picture Wink I can't calculate that becouse I don't have value of R8 and R9.You must calculate R789=R7||(R8+R9) and R456=R5||(R4+R6) now you can calculate Up=UR4+UR6 and then UR6=Up* R6/(R4+R6). Do you get it now? Smile
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    Re: Electric HELP!!

    Post by Ahmed on Sun Dec 14, 2008 3:09 pm

    Look this time Ill give youe veerything:

    R1=560 ohms
    R2=56 ohms
    R3=910 ohms
    R4=1000 ohms
    R5=560 ohms
    R6=1000 ohms
    R7=1000 ohms
    R8=560 ohms
    R9= 560 ohms

    Total Volts= 60 Volts

    Electricity is so confusing.


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    Re: Electric HELP!!

    Post by wilku_88 on Sun Dec 14, 2008 4:41 pm

    I calculate this and I have answer UR6 = 13,58V I check this on simulation in Electronic Workbench 5.0
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    Re: Electric HELP!!

    Post by Ahmed on Sun Dec 14, 2008 4:57 pm

    Your circuit looks different than mines...does it matter?


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    Re: Electric HELP!!

    Post by wilku_88 on Sun Dec 14, 2008 5:37 pm

    What's the different? Do you mind missing R2? I draw that circuit according to your instruction:
    Ibn Rushd wrote:
    This is the correct notation:

    R1||(R2+R3||[(R8+R9)||R7+R5||(R4+R6)])

    ** "||" =the parallel sign
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    Re: Electric HELP!!

    Post by Ahmed on Sun Dec 14, 2008 5:45 pm

    Yes, that si the correct notation



    ^^^But, this is the correct circuit...


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