5005 Praxis Practice Test Practice Question
Which of the following materials provides the least electrical resistance?
Correct Answer: D
Rationale: Electrical resistance varies significantly among materials based on their atomic structure and electron mobility. Copper, a metal, has a high density of free electrons, allowing for efficient current flow and minimal resistance. In contrast, plastic, oak, and rubber are all insulators or semiconductors. Plastic and rubber, both synthetic and natural insulators respectively, hinder electron movement significantly, resulting in high resistance. Oak, while a natural material, also possesses insulating properties due to its fibrous structure. Thus, copper stands out as the material with the least electrical resistance.
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