Which of the following has the lowest electrical resistivity ?
Correct answer: A. Graphite
- A. Graphite
- B. Fireclay
- C. Alumina
- D. Zircon
Explanation
Graphite conducts electricity through its delocalised carbon electrons and therefore has far lower electrical resistivity than fireclay, alumina, or zircon. The other three are electrically insulating ceramic refractories.
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