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

pully Group Title

When a capacitor has a charge of absolute value 80 µC on each plate the potential difference across the plates is 10 V. How much energy is stored in this capacitor when the potential difference across its plates is 120 V?

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. arcticf0x Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Do you know how to find the capacitance when charge and voltage are given?

    • 2 years ago
  2. arcticf0x Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Anyway, use q=C*V to find C. Plug it into E=1/2*C*V^2.

    • 2 years ago
  3. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    are you sure from this laws :D I applied this rules and the answer is wrong :S

    • 2 years ago
  4. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    0.48 mJ 58 mJ 0.12 J 0.90 GJ 0.36 J

    • 2 years ago
  5. rajathsbhat Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @pully, are these the options?

    • 2 years ago
  6. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

    • 2 years ago
  7. rajathsbhat Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    when i followed @arcticf0x's method, i got 57.6 mJ

    • 2 years ago
  8. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I got 5.76x10^10

    • 2 years ago
  9. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so it will be 58 mj

    • 2 years ago
  10. rajathsbhat Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

    • 2 years ago
  11. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thnx :)

    • 2 years ago
  12. arcticf0x Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    http://www.wolframalpha.com/input/?i=1%2F2*%2880*10^%28-6%29%2F10%29*120^%282%29

    • 2 years ago
  13. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thnx :)

    • 2 years ago
  14. ahmedanbar Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i don't understand the answer i have the same question

    • 2 years ago
  15. pully Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Apply this Ahmed q=C*V to find C. Plug it into E=1/2*C*V^2. Then you will get 57.6 mJ

    • 2 years 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.