Question
A scientist observes that the electrical resistance of a superconducting material drops to zero when the material is cooled to very low temperatures. Which of the following statements best describes what the scientist is observing?
The scientist is observing the electrical power of a superconductor.
The scientist is observing the temperature of a superconductor.
The scientist is observing an intensive property of a superconductor.
The scientist is observing an extensive property of a superconductor.
The scientist is observing the electrical power of a superconductor.
The scientist is observing the temperature of a superconductor.
The scientist is observing an intensive property of a superconductor.
The scientist is observing an extensive property of a superconductor.
Answers
Answered by
GPT-5 mini
The scientist is observing an extensive property of a superconductor.
Reason: electrical resistance depends on the size/shape of the sample (R = ρL/A), so it is an extensive (amount‑dependent) property. (Resistivity ρ and the critical temperature are intensive.)
Reason: electrical resistance depends on the size/shape of the sample (R = ρL/A), so it is an extensive (amount‑dependent) property. (Resistivity ρ and the critical temperature are intensive.)
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