Physics
2017 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE PH 2017 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 31–33 of 65. Imported answers require review unless explicitly marked reviewed.
Question 31
Open questionPHNAT2 marksNeeds review
Consider a 2-dimensional electron gas with a density of
. The Fermi energy of the system is ______ eV (up to two decimal places). (
)Log in to check the answer
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The total energy of an inert-gas crystal is given by
(in eV), where R is the inter-atomic spacing in Angstroms. The equilibrium separation between the atoms is ______ Angstroms. (up to two decimal places).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 33
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Consider
non-interacting, distinguishable particles in a two-level system at temperature
. The energies of the levels are 0 and
, where
. In the high temperature limit (
), what is the population of particles in the level with energy
?Your answerChoose one option.
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