Competency #8

Answer and Explanation

Electric current is: The correct answer is D.

  1. The movement of electrons in a wire.

    This is a type of electric current. In a solid, the protons are located in the nuclei, which are basically stationary. Therefore, current through solids (such as a wire) is achieved by the movement of electrons.
  2. The movement of positive or negative ions in a fluid.

    This is also a type of electric current. In a fluid, positive and negatively charged ions are free to move.
  3. The flow of charged particles.

    This is a general definition of electric current.
  4. All of the above.

    This is the correct answer.
  5. None of the above.
© 2008 Anne Arundel Community College