Why is graphite used as an electrode in batteries?
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Graphite or "graphite paste" is used for electrodes because a) it is conductive b) it is inexpensive c) it can continuously expose a "fresh" surface. I'm not sure if you want to call brushes for motors "electrodes" but, for that purpose, carbon's low coefficient of friction is a plus.
ruchisr123:
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bcoz it is a good conductor of electricity...
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