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: Initial conditions question

  1. Jan 19, 2010 #1
    http://i48.tinypic.com/1o4ow9.jpg

    why in this circuit they say that in t<0
    the voltage on both capacitators is 12 volts??

    if both points of each capacitators is connected to the voltage source directy
    then 12 volts is ok.

    but here we have a resistor between them
    this resistor drops the original voltage
    it cannot be 12
     
  2. jcsd
  3. Jan 19, 2010 #2

    berkeman

    User Avatar

    Staff: Mentor

    If there is no current through a resistor, what is the voltage drop?

    The current through the resistors has decayed off to zero, if the circuit has been connected up like that for a long time before t=0. Make sense?
     
  4. Jan 19, 2010 #3
    thanks :)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook