Which effect does not apply to the movement of electrons in a conductor?

• A. Magnetic energy.
• B. Static energy.
• C. Thermal energy.
• D. Electrical potential energy.

Answer: (B)

Movement of electrons in a conductor is dynamic, with energy changing as current flows. The moving charges generate magnetic fields, so magnetic energy is involved. The resistance of the material causes collisions that dissipate electrical energy as heat, giving thermal energy. As electrons move through regions of different electric potential, their electrical potential energy changes, typically decreasing as they travel from high to low potential. Static energy, on the other hand, relates to charges at rest; when charges are moving, the situation is not static, so static energy does not describe the energy changes involved in the current. Hence static energy does not apply to the movement of electrons in a conductor, while magnetic, thermal, and electrical potential energy do.