JAMB Physics 2013 Question 42

Question 42

Electrostatics

When a charge moves through an electric circuit in the direction of an electric force, it

  1. A.gains both potential and kinetic energy.
  2. B.gains potential energy and loses kinetic energy.
  3. C.loses potential energy and gains kinetic energy.
  4. D.loses both potential and kinetic energy.
Show the answer and explanation

Answer: C (loses potential energy and gains kinetic energy.)

Explanation

When a charge moves the way the electric force pushes it, the field does work on it: electrical potential energy is turned into kinetic energy.