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Which Material Is the Best Conductor of Electricity?

physicsmaterials science

Quick Answer

Silver is the best conductor of electricity among all metals, with a resistivity of just 1.59 × 10⁻⁸ ohm-meters.

The Full Story

Silver has the lowest electrical resistivity of any metal at 1.59 × 10⁻⁸ ohm-meters at 20°C, making it the best natural conductor of electricity. Copper is a close second at 1.68 × 10⁻⁸ Ω·m, which is why copper — being far cheaper — is the standard material for electrical wiring worldwide. Gold ranks third at 2.44 × 10⁻⁸ Ω·m but is valued in electronics for its corrosion resistance, which maintains reliable connections over time. At extremely low temperatures, superconductors conduct electricity with zero resistance; the current highest-temperature superconductor operates at about −23°C under extreme pressure. Room-temperature superconductivity remains one of physics' most sought-after goals.

Key Facts

1.About 60% of all silver consumed industrially goes into electronics, solar panels, and electrical contacts
2.Copper wiring carries roughly 95% of the electrical current in a typical home
3.Graphene, a single layer of carbon atoms, conducts electricity better than copper per unit weight but is difficult to produce at scale

YouTube Angle

Suggested video title for this topic:

"Why we use copper instead of silver for wiring — the economics behind electrical conductors"

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