Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

zachkt

determine the potential difference Vxy in the circuit.

  • one year ago
  • one year ago

  • This Question is Open
  1. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1348230038272:dw|

    • one year ago
  2. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    srry hold on something went wrong

    • one year ago
  3. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    let me add in the Voltage and resistor values

    • one year ago
  4. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    sure

    • one year ago
  5. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1348230380036:dw|

    • one year ago
  6. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    do you want me to give you the answer or the way to solve it?

    • one year ago
  7. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    the way

    • one year ago
  8. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    you know superposition?

    • one year ago
  9. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    like a super node?

    • one year ago
  10. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    Assuming you know the program "Multisim" i simulated this circuit and i have certain values already so I do not think i need to use a complex calculation. I guess my question is, what exactly in the circuit do i need to solve the potential difference Vxy

    • one year ago
  11. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    ok! this problem can be solved using superposition theorem. which states, "In a linear network the overall response is the sum of the responses, one energy source acting at a time." So the approach to the problem is like this. first keep the source of 2V on and calculate the voltage at x and when you do this, short circuit all other voltage sources. Similarly repeat the procedure by keeping the 4V source on (on the extreme right) and short circuiting all other sources, find potential at y. now you have potential at X and Y and also the potential that bridges them, i.e 4V. see the polarity and add. you will get the answer

    • one year ago
  12. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    so i just need to find the voltage at X and Y? then what?

    • one year ago
  13. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    then you add the voltage as per polarity from x-3ohm-4V-3ohm-Y

    • one year ago
  14. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    so i subtract the voltageX by 3ohms then subtract by 4V then subtract by 3ohms then subtract by voltageY?

    • one year ago
  15. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    okay Voltage X is 1.2V and Y is 2.5, can you show me how to do the rest?

    • one year ago
  16. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    Vx-4V-Vy 1.2-4-2.5 1.2-6.5 -5.3V Vxy = -5.3V

    • one year ago
  17. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    now why is it Vx-4V instead of Vy-4V? is it because Vx is at higher potential ?

    • one year ago
  18. kashyapbharat48
    Best Response
    You've already chosen the best response.
    Medals 0

    Vxy = -.5

    • one year ago
  19. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    no it's because when I go from X to Y I need to follow a convention. chose all voltage drops to be +ve and all voltage rises to be -Ve. So from X, the resistor gives me a voltage drop of 1.2V which I consider positive. The as I walk further I see a battery in reverse with 4V, since it is reverse, it gives me a voltage rise of 4V (-ve terminal is at lover potential to +ve, so it's a rise) and I consider it to be -Ve.

    • one year ago
  20. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    and also dude, I have assumed that you chose the same convention to solve for voltages. The sketch you have uploaded doesn't show the right half properly, if possible redraw and i'll tell you the way to solve it

    • one year ago
  21. pitankar
    Best Response
    You've already chosen the best response.
    Medals 0

    @kashyapbharat48 seems to have solved it.

    • one year ago
  22. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    that was all that was drawn in the problem, so that is all the information i know. I then had to use a computer program to simulate the circuit and i have the values of the voltages at X an Y

    • one year ago
  23. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    how is it -0.5?

    • one year ago
  24. kashyapbharat48
    Best Response
    You've already chosen the best response.
    Medals 0

    whats the correct ans?

    • one year ago
  25. zachkt
    Best Response
    You've already chosen the best response.
    Medals 0

    i do not have the correct answer, I just want to know how you solved that?

    • one year ago
  26. kashyapbharat48
    Best Response
    You've already chosen the best response.
    Medals 0

    try the superposition method u'll get it

    • one year ago
  27. MillerZ
    Best Response
    You've already chosen the best response.
    Medals 1

    the correct solution is:

    • one year ago
  28. MillerZ
    Best Response
    You've already chosen the best response.
    Medals 1

    Vy-Vx=-3.7V

    • one year ago
  29. MillerZ
    Best Response
    You've already chosen the best response.
    Medals 1

    • one year ago
    1 Attachment
  30. MillerZ
    Best Response
    You've already chosen the best response.
    Medals 1

    review the file...

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.