The resistivity p of copper in Ω m is ______?
- 5.00x10-⁸
- 1.54x10-⁸
- 1.68×10⁻⁸
- None of these
Explanation
Resistivity (ρ) is a material property that measures how strongly a material opposes electric current.
For copper, the standard resistivity at 20°C is approximately 1.68 × 10⁻⁸ Ω·m.
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