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: I need help

  1. Oct 8, 2007 #1
    I can not figure out these following questions can anyone help me?

    1) Hydrogen’s electron and proton are separated by 5.3x10-13 meters. What is the electrical force between them?

    2) A charge moved .02 meters in an electric field of force 215 N/C. If the electric potential decreased by 6.9x10-19, what is the charge of the particle?

    3) If a capacitor has 3.0x10-6 F of capacitance and holds 3.6x10-5 C of charge on each plate, what is the voltage of the battery connected to it?

    4) Iron has a resistance of 19.0 Ohms. What is the current if the potential difference is 120 V?
  2. jcsd
  3. Oct 8, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook