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: What is the output voltage in this circuit?

  1. Feb 13, 2012 #1

    I would like to know the output voltage in this circuit at label A. (I am a beginner , sorry for stupid questions if any? )

    The circuit setup is a sine wave source (ideal) in parallel with DC source series with a resistor.

    -Devanand T
  2. jcsd
  3. Feb 13, 2012 #2
    point A is at other end of AC source V
    so voltage at A is V itself ...
  4. Feb 13, 2012 #3
    what about dc source plus resistor
  5. Feb 13, 2012 #4
    It is all dependent on the source impedance of the voltage source V. The way it is drawn, Rsource (Zsource) =0, so point A will be at V volts (it will follow the sinusoid) since it is a direct short.

    if there were an R in between the source and node A, then you could determine the voltage there by using superposition and treating each voltage source separately (making the other voltage source 0) and using the voltage divider rule. The resulting value of A is the sum of the contributions from each source.
    Last edited: Feb 13, 2012
  6. Feb 13, 2012 #5
    Thankyou all for the replies
  7. Feb 13, 2012 #6
    it doesn't matter .
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook