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!

What does Open Circuit Voltage mean?

  1. Sep 5, 2014 #1
    I have a multimeter and for the "ohmeter section" for resistance it goes from a range of

    ~ 200 Ohms to 2000 kilo-ohms

    and then says also....

    Max. Open Circuit Voltage: about 3V
    Overvoltage protection: 250V AC


    Thank you in advance
     
  2. jcsd
  3. Sep 5, 2014 #2

    anorlunda

    User Avatar
    Science Advisor
    Gold Member

    An ohmmeter measures the ratio of voltage to current. It applies the voltage itself. It is telling you that with infinite resistance, it can apply 3 volts. It probably has no practical significance to you.
     
  4. Sep 5, 2014 #3

    Averagesupernova

    User Avatar
    Science Advisor
    Gold Member

    Most modern ohmmeters don't have an open circuit voltage that is much over a couple of volts. However, older stuff that used tubes could have an open circuit voltage on the order of 30 volts. This is important to remember if you ever run into one of these. Seems unlikely but never say never.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: What does Open Circuit Voltage mean?
Loading...