Final answer:
The term 'Ground loop' describes the current flow from one grounded point to a second grounded point in the same powered loop.
Step-by-step explanation:
The term that describes current flow from one grounded point to a second grounded point in the same powered loop is known as a Ground loop (option A). A ground loop can occur in an electrical system where two or more points are supposed to have the same ground reference potential, yet end up with different potentials. This is often due to the flow of current between these points through the grounding system, creating unintended currents that can cause interference, especially in audio and communication equipment.