Connect with us

perfect voltage source

Discussion in 'Electronics Homework Help' started by bhuvanesh, Feb 4, 2014.

Scroll to continue with content
  1. bhuvanesh


    Aug 29, 2013
    a 9 volt alkaline battery with series of 3 ohm resistor behaves as perfect voltage source

    what does perfect voltage source means
    that 3 ohm already present inside battery as internal,then why we have to supply externally
  2. Arouse1973

    Arouse1973 Adam

    Dec 18, 2013
    A perfect voltage source will have zero resistance and produce an infinite current as the load goes to zero. A battery and 3Ohm resistor is far from a perfect voltage source. Also a perfect current source will have an infinite resistance and produce an infinite voltage as the load goes to infinity .

    Oh just one other thing, they don't exist in real life. They are used to make circuit analysis easier.
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Your 9V battery might seem to be a perfect voltage source for high values of load resistance. In fact it might be convenient to consider it as such.

    Note that along with the things Adam mentioned above, the 9V battery doesn't always have a terminal voltage of 9V and it changes with temperature, load, age, state of charge, etc.

    edit: you already have the other question you asked in another post. Please don't think we're going to sit here doing your homework for you.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day