Multiple choice

The Pauli Exclusion Principle is applicable to ----------------------- .

  1. quark degeneracy

  2. neutron degeneracy

  3. proton degeneracy

  4. electron degeneracy
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D Correct answer
Explanation

In ordinary gas, most of the electron energy levels (n-spheres) are unfilled and the electrons are free to move . As particle density is increased electrons progressively, fill the lower energy states and additional electrons are forced to occupy states of higher energy. Degenerate gases strongly resist further compression because the electrons cannot move to lower energy levels, which are already filled. The Pauli Exclusion Principle causes this.

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