Which of the following materials has the poorest electrical conductivity ?
Correct answer: A. Carbon
- A. Carbon
- B. Aluminium
- C. Silver
- D. Stainless steel
Explanation
Carbon has much lower electrical conductivity than metals such as silver and aluminium; stainless steel is also relatively resistive but generally conducts better than carbon. The conductivity of carbon varies with its form, but the usual comparison gives carbon as the poorest conductor here.
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