A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

when a source is connected to a 2 ohm resistor the current is 0.5 ampere if the same source is connected to a 5 ohm resistor the current is 0.25 find the potential of the battery??

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @irishboy123

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

    @arindameducationusc

  3. IrishBoy123
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[V = IR = 2 * 0.5 \ne 5 *0.25\] post/link original question?!

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

    I think that in your circuit we have to consider the internal resistance R0 of the battery, so we have the subsequent equation: \[\Large E = \left( {R + {R_0}} \right)I\] where E is the electromotive force of your battery, and R is the external resistance. Using your data, we get the subsequent algebraic system of two equations: \[\Large \left\{ \begin{gathered} E = \left( {2 + {R_0}} \right) \cdot 0.5 \hfill \\ E = \left( {5 + {R_0}} \right) \cdot 0.25 \hfill \\ \end{gathered} \right.\] Please solve it for E

  5. IrishBoy123
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Michele_Laino cool!

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

    thanks! :) @IrishBoy123

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

    @Michele_Laino A correct and wise assumption. Most problems ignore internal resistance considering an ideal source. This case, it matters.

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

    Nice @Michele_Laino :)

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

    @PlasmaFuzer

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

    @Michele_Laino how can we get R0 because its not given???

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

    thanks! :) @iambatman @radar

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

    If we equate, each other, both right sides of the two equations above, we get: \[\Large \left( {2 + {R_0}} \right) \cdot 0.5 = \left( {5 + {R_0}} \right) \cdot 0.25\] which is an equation of first degree in R0. Please solve it for R0. @Shiraz-Khokhar

  13. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.