If WF is the Fermi level, then in a metal at T = 0 – McqOptions

MCQOPTIONS

1.	If WF is the Fermi level, then in a metal at T = 0
A.	all energy levels above WF filled, all those below WF are empty
B.	all energy levels below WF are filled, all those above WF are empty
C.	some energy levels, both below and above WF, are filled
D.	all energy levels below and above WF are filled
Answer» C. some energy levels, both below and above WF, are filled

Discussion

No Comment Found

Related MCQs

The spin angular momentum along a given direction is either or .
For a diamagnetic material, μr = 1.
If ω0 is the angular frequency of rotation of electron in the absence of magnetic field, the angular frequency ω, when a magnetic field B is acting is ω ≅ ω0 + (e/2m)B.
M = (μr - 1)H.
If e is the charge of an electron, R is the radius of its orbit and ω is the angular velocity of electron, the magnetic dipole moment μm of the orbit is |μm| = eωR2.
If B, H and M denote flux density, field intensity and magnetisation, B = μ0 (H + M).
A leaky dielectric has ∈r = ∈r' - j∈r". If a field E is applied, the current component in phase with E is proportional to ∈r".
If ∈r = ∈r' - j∈r" tan δ = .
The equation D = ∈0∈r E refers only to isotropic materials.
In an homogeneous dielectric subjected to an electric field E, the dipole moment per unit volume is ∈0(∈r - 1) E.