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Charge moves through a circuit element and loses energy

  1. Sep 15, 2015 #1
    1. The problem statement, all variables and given/known data

    If +6 (C) charge moves through a circuit element, and in so doing the charge loses 12 (J) of energy, then what is the magnitude of the voltage across this circuit element?

    A)2(V)
    B)6(V)
    C)12(V)
    D)72(V)

    For the same circuit element and situation described in question 1, is the +6 (C) of charge passing through a voltage rise, or a voltage drop?

    A) voltage rise
    B) voltage drop
    C) none of the above

    2. Relevant equations

    V = J/C



    3. The attempt at a solution

    V = 12(J)/2(C) = 2(V)

    Since the circuit lost energy, it will be a voltage drop because the element absorbed power.

    Is my reasoning right here? It seems too easy for it to be so simple.

    Thanks
     
    Last edited: Sep 15, 2015
  2. jcsd
  3. Sep 15, 2015 #2
    Typo [6(C)?]. Otherwise, looks OK. You can check with a basis of 1 sec then using J, V, A, and W equations.
     
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