Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How real voltmeter works

  1. Apr 10, 2008 #1
    1. The problem statement, all variables and given/known data

    A voltmeter with resistance R_V is connected across the terminals of a battery of emf EMF and internal resistance r. Find the potential difference V_meter measured by the voltmeter.

    2. Relevant equations

    v=IR Vab= Va -Vb

    3. The attempt at a solution

    tried using equations with epsolon.
  2. jcsd
  3. Apr 10, 2008 #2
    Just go in a loop around the circuit, and re-arrange for Vf-Vi
    Last edited: Apr 10, 2008
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook