Which material is the best conductor?

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Silver

Porcelain

Rubber

Gold

answer is A.

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Detailed Solution

Concept: A conductor, or electrical conductor, is a substance or material that allows electricity to flow through it. In a conductor, electrical charge carriers, usually electrons or ions, move easily from atom to atom when voltage is applied.
Most metals like copper are considered good conductors, while nonmetals are considered bad conductors -- that is, insulators.
Hence, in the above options only silver and gold are conductors but for silver it is easy to lose electrons as compared to gold so it is the best conductor.
Hence, option 1 is correct.

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