Question

What is a circuit?

What subatomic particles flow in batteries to create a current?
What is an LED? AND what do the letters stand for?

Answer 1

[AI-generated answer — Bot GPT 3.5]

A circuit is a closed loop through which an electric current can flow.

Subatomic particles that flow in batteries to create a current are electrons.

A LED is a Light Emitting Diode.