alleryStart learning →In 1980 a further discovery was made about the Hall effect. What was it?
AIt grows without limit in a thin sample
BIt is quantized in a macroscopic object
CIt disappears in a macroscopic object
DIt reverses sign in every metal sample
Answer & Solution
Correct answer: B. It is quantized in a macroscopic object
1. The Hall effect had been used since 1879 as a laboratory tool.
2. In 1980 it was discovered that the Hall effect is quantized.
3. That made it an example of quantum behaviour showing up in a macroscopic object.
4. Disappearance or unlimited growth would have destroyed its use as a measuring tool, which it remains.
_Source: OpenStax College Physics (CC BY 4.0), Ch 22 "Magnetism", section 22.6 The Hall Effect_
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