ಕೆಳಗಿನವುಗಳಲ್ಲಿ ಯಾವುದು ವಿದ್ಯುಚ್ಛಕ್ತಿಗೆ ಉತ್ತಮ ವಾಹಕವಾಗಿದೆ?

Graphite has free (delocalised) electrons between its carbon layers, so it conducts electricity and is used for electrodes. Mica, Bakelite and dry air are insulators.