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B Work done by voltage source

  1. Apr 29, 2017 #1
    Is the work done by a constant voltage source positive or negative when current is opposite to emf?
     
  2. jcsd
  3. Apr 29, 2017 #2

    Dale

    Staff: Mentor

    Negative
     
  4. Apr 29, 2017 #3
    when current enters positive terminal of voltage source, voltage source charges up , so it gains energy , its power(energy derivative) is positive
    shoudnt work done (power integral)be positive?
     
  5. Apr 30, 2017 #4
    Work done by the voltage source is negative because it receives energy.
    Work done by whatever current source you have, is positive.
     
  6. Apr 30, 2017 #5

    Dale

    Staff: Mentor

    Work done on the source is positive. You asked about work done by the source, which is negative.
     
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