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: Capacitance, switches, and lightbulbs oh my

  1. Sep 24, 2008 #1
    1. The problem statement, all variables and given/known data

    The capacitor in the figure below has a large capacitance and is initially uncharged. After the switch is closed, what happens to the lightbulb?

    You cant paste the figure but it is a circuit with a capacitor paralled to a battery and in series with a lightbulb. a open switch is in parallel with the lightbulb and in series with the battery.

    2. Relevant equations

    3. The attempt at a solution

    I think it will glow continuously as the capacitor recieves energy from the battery and as long at the switch remains closed the lightbulb should stay on right??
    or does it only glow when the capacitor is fully charged??
  2. jcsd
  3. Sep 24, 2008 #2


    User Avatar
    Homework Helper

    When the capacitor is fully charged, how much current is flowing?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook