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Voltmeter relative error question. (Computer Controlled Measurement)

  1. Jun 4, 2013 #1
    1. The problem statement, all variables and given/known data

    You measure 50V with a voltmeter, which has 300V as the max. input voltage. What will be the relative error (h%) of the measurement?
    2. Relevant equations

    3. The attempt at a solution
    hi i divided 50v / 300 V and get = 1,66 and divided it by 100 to get relative error in % and get %0.0016 just wanted to know my answer is correct or not thank you from now.
  2. jcsd
  3. Jun 4, 2013 #2

    rude man

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    Homework Helper
    Gold Member

    Hard to say. As in 'impossible' with what you gave us.

    Voltmeters usually have an absolute voltage error plus a "% of full scale" error. So if the
    reading is 50V, the absolute error is 0.1V and the % of full scale is 0.1% the error would be +/- (0.1V + 300*0.001V) = +/- 0.4V. So the 'relative eror' of your measurement would be +/- 0.4/50 = 0.8%.
  4. Jun 4, 2013 #3
    just got an email from the teacher he is mistaken he havent complated the question and i solved it anyway thanks for your helps
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