Question

which reason best explains why plasmas are good conductors of electricity?

they have slow-moving nuclei that carry electricity
they have mobile charged particles
they are made up of particles in fixed positions
they are at extremely high temperatures

Explanation:

Define plasma composition

Plasma is an ionized gas consisting of free-moving positive ions and free electrons.

Analyze electrical conductivity

For a substance to conduct electricity, it must contain mobile charged particles that can move freely in response to an electric field.

Evaluate the given options

• "They have slow-moving nuclei that carry electricity": Incorrect, as conductivity is primarily driven by highly mobile free electrons.
• "They have mobile charged particles": Correct, because the presence of free electrons and ions allows electric current to flow easily.
• "They are made up of particles in fixed positions": Incorrect, this describes solids.
• "They are at extremely high temperatures": Incorrect, while high temperatures often create plasma, temperature itself is not the direct mechanism of electrical conduction.

Answer:

• They have slow-moving nuclei that carry electricity
• They have mobile charged particles (Correct answer)
• They are made up of particles in fixed positions
• They are at extremely high temperatures