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Ohm resistors and current

  1. Apr 30, 2007 #1
    1. The problem statement, all variables and given/known data
    you measure a 20v potential difference across a 5 ohm resistor. what is the current?
    3. The attempt at a solution
    20 v/5 ohms = 4 v

    is this correct? thanks.
  2. jcsd
  3. Apr 30, 2007 #2
    No, not correct; your units are wrong
    (why would a volt divided by an ohm be a volt?)
    And, if you're looking for current, what is the SI unit for current?

    Otherwise, it's fine. Personally, I prefer to see the equation you used before you plug in values.
  4. Apr 30, 2007 #3
    typo, meant to put:

    20 V / 5 ohms = 4 A
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