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Homework Help: Find the voltage across the resistor

  1. Oct 24, 2016 #1
    1. The problem statement, all variables and given/known data
    A battery with scriptE.gif = 12.0 V and internal resistance r = 1.0 Ω is connected to two 6.9 kΩ resistors in series. An ammeter of internal resistance 0.50 Ω measures the current, and at the same time a voltmeter with internal resistance 10.0 kΩ measures the voltage across one of the 6.9 kΩ resistors in the circuit. What do the ammeter and the voltmeter read?

    2. Relevant equations

    3. The attempt at a solution
    So I found the ammeter reading where Itotal=1.09mA which was correct.
    For the voltmeter reading, I got:
    V=Itotal*6.9kΩ=7.52V which was incorrect. Anyone care to help?
  2. jcsd
  3. Oct 24, 2016 #2


    User Avatar
    Gold Member

    Help what? You haven't shown any work, just answers. That's not the way it works here.
  4. Oct 24, 2016 #3
    Ammeter reading:
    Rtotal= 6.9kΩ+4082.84Ω+1Ω+.5Ω=10984.34Ω

  5. Oct 24, 2016 #4
    Ah, I got it it's V=ItotalRparallel
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