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Which of the following is a good electrical conductor?

  1. Aluminum

  2. Copper

  3. Plastic

  4. Wood

The correct answer is: Copper

Copper is widely recognized as an excellent electrical conductor, making it a preferred material in electrical wiring and components. Its high conductivity means that it can efficiently transmit electrical current with minimal resistance, which is essential for a variety of applications, including residential, commercial, and industrial electrical systems. This property allows for reduced energy loss in the form of heat, ensuring that devices receive the intended amount of power effectively. While aluminum is also a good conductor and is used in some applications, it does not outperform copper in terms of conductivity. Plastic and wood, on the other hand, are insulators; they resist the flow of electricity and are used for protecting conductive materials rather than conducting electrical current. Hence, copper stands out as the most effective option among the choices provided.