1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Isolated parallel plates

  1. Sep 16, 2007 #1
    which statements are true for two oppositely charged, isolated parallel plates: C=capacitance, U=stored energy, (Q and -Q =charged on the plates). Note: isolated plates can not lose their charge.

    a. when the distance is doubled, U increase.
    b. inserting a dielectric increases Q
    c. when the distance is halved, Q stays the same.
    d. when the distance is doubled, C increases
    e. insertng a dielectric increases C
    f. increasing the distance increases the Electric Field
    g. inserting a dielectric decreases U

    by using these equations: C=Eo (a/d) , Q=CV, and U=1/2 QV, Q^2/2C
    i came up with TFTTTFT, but its not right anyone has any idea of what i might of done wrong?
    Last edited: Sep 16, 2007
  2. jcsd
  3. Sep 16, 2007 #2
    Look at d carefully.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook