GradePack

    • Home
    • Blog
Skip to content
bg
bg
bg
bg

Author Archives: Anonymous

The Hydrogen  Atom is described by the Bohr’s model.  You ar…

The Hydrogen  Atom is described by the Bohr’s model.  You are required to calculate the wavelength of light that will be emitted (or absorbed) by the Hydrogen  Atom, when an electron goes from the 4th energy level (4th orbit)      to      the 2nd energy level (2nd orbit).  From this formula sheet, which formulas and in which order will you have to apply to calculate the wavelength ?  (An equation repeated twice in the list of options means that the same equation, with some modifications, is applied twice).  (1)

Read Details

At some particular temperature, in the unit volume of an int…

At some particular temperature, in the unit volume of an intrinsic semiconductor, the number of the broken covalent bonds is equal to 0 (Zero).    In this particular semiconductor, at this particular temperature, what can you say about the mobile carrier concentration? (build the matching pairs).

Read Details

What is the meaning of a lattice constant a ?

What is the meaning of a lattice constant a ?

Read Details

What do we mean when we use the following notation (001), (0…

What do we mean when we use the following notation (001), (011), (101), etc ?

Read Details

Which of the following are the units of density (which was u…

Which of the following are the units of density (which was used in HW1)? Encircle All that apply. 

Read Details

Before the Bohr’s model was introduced, it was believed that…

Before the Bohr’s model was introduced, it was believed that certain values are continuous (not discrete). Instead, the Bohr’s model suggested that those  values are “quantized” (discrete). What are those values that are “quantized” according to the Bohr’s model.  (Select All that apply)

Read Details

You have an intrinsic semiconductor. It operates at room tem…

You have an intrinsic semiconductor. It operates at room temperature. It does NOT have donors or acceptors.  Its energy Band-gap is 1 eV. Assume that the width of the Valence Band is more than 5 eV.   In this particular (intrinsic) semiconductor, which values of the energy an electron cannot have ?  Select All the correct statements below. 

Read Details

Which of the following determines a particular color of ligh…

Which of the following determines a particular color of light (encircle ALL answers that apply)

Read Details

Which of the following are the units of concentration (e.g.,…

Which of the following are the units of concentration (e.g., concentration of free carriers)? Encircle All that apply. 

Read Details

Photoelectric effect is when electrons escape from a metal w…

Photoelectric effect is when electrons escape from a metal when it is illumination with a light. If the energy of a photon of light is larger than the metal work-function, can an electron escape from the metal? If yes, what will be its kinetic energy after escaping?

Read Details

Posts pagination

Newer posts 1 … 46 47 48 49 50 … 98,424 Older posts

GradePack

  • Privacy Policy
  • Terms of Service
Top