Multiple choice general knowledge

"IACS" stands for...... (is the unit for expressing the electrical conductivity of nonmagnetic materials.)

  1. Internal Annealed Copper Standard.

  2. Internal Active Conductivity Standards

  3. International Annealed Copper Standard.

  4. International Annealed Conductivity Stanadard
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C Correct answer
Explanation

IACS stands for International Annealed Copper Standard, which defines 100% IACS as the conductivity of pure annealed copper at 20°C. This standard is used worldwide to express electrical conductivity of metals as a percentage of copper's conductivity. Pure copper has the highest conductivity of all non-precious metals.

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