Quantum Physics Mcq Queaions Please Help 1 (23.78 KiB) Viewed 27 times
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Which statements regarding the heat capacity of conduction electrons in a metal is true O The distribution for the average number of fermions in a single particle state is completely different for room temperature and for absolute zero. The heat capacity for electrons in a metal is adequately described by the classical theory. O The heat capacity can be explained in terms of a fermion gas. The heat capacity can be explained in terms of a classical gas. The heat capacity is independent of temperature O The heat capacity can be explained by fermion behaviour, which will mostly transition to higher energies from close to the fermi surface.
Which of the following statements regarding the average occupation number of states (eqn 2.30 in your textbook) is true? The particle energy must always be larger than the chemical potential. The expression is valid for fermions and bosons, with + and -choice of signs respectively. O The expression is not valid as the temperature tends to zero. O The expression is invalid when the chemical potential is zero. O The expression is valid for classical particles. O Classical and quantum particles have a +1 and -1 in the denominator respectively.
In a p-n junction without an external battery connected, the electrons and holes move until: The concentration of the electrons and holes becomes too large. All the electrons and holes have been neutralised. O A high, internal electric field helping their motion is established. O Their diffusion is cancelled by an electric field arising due to space charges. The resistance of the material becomes too high. O An external battery is connected.
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