Question:
Which of the following is an electrical conductor at room temperature?
Which of the following is an electrical conductor at room temperature?
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Metals like tin conduct electricity well at room temperature due to free electrons. Semiconductors and insulators need higher energy or doping to conduct.
Updated On: Feb 9, 2026
- Sn
- Mica
- Si
- C
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The Correct Option is A
Solution and Explanation
- Sn (Tin) is a metal and, like most metals, is a good electrical conductor at room temperature.
- Mica is an insulator — it does not allow free flow of electrons.
- Si (Silicon) is a semiconductor, and its conductivity increases only at higher temperatures or when doped.
- C (Carbon) in the form of diamond is an insulator, and in the form of graphite it is a poor conductor — not as good as a metal like tin.
Therefore, the best electrical conductor among the given options at room temperature is Sn (Tin). Final answer: Sn
- Mica is an insulator — it does not allow free flow of electrons.
- Si (Silicon) is a semiconductor, and its conductivity increases only at higher temperatures or when doped.
- C (Carbon) in the form of diamond is an insulator, and in the form of graphite it is a poor conductor — not as good as a metal like tin.
Therefore, the best electrical conductor among the given options at room temperature is Sn (Tin). Final answer: Sn
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