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).

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. In the given experiment, a particular number of electrons are escaping every second. Each of those electrons have the same particular value of the Kinetic energy.What will happen when the only change in your experiment is that you use a different metal that has a higher Work-function?  

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)