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Which of the following statements is/are correct? 1) Conductor contains a large number of electrons in the conduction band at room temperature. No energy gaps exist and the valence and conduction bands overlap. 2) A semiconductor is a material in which the energy gap is so large that practically no electron can be given enough energy to jump this gap. 3) An insulator is a solid with an energy gap small enough for electrons to cross rather easily from the valence band to conduction band.
A semiconductor has generally . . . . . . . . valence electrons.
Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell?
An intrinsic semiconductor with mass of a hole mh, and mass of an electron me is at a finite temperature T. If the top of the valence band energy is Ev and the bottom of the conduction band energy is Ec, the Fermi energy of the semiconductor is
Given below are four jumbled sentences.Select the option that gives their correct order.  A.These types of issues generally generate a widespread consensus and provoke little resistance from the public.   B. to a large enough degree that some social scientists might speak of them as though they are universal, for the sake of illustration.  C. A valence issue is a social problem that people uniformly interpret the same way.   D.An example of a valence issue would be child abuse, which is condemned across several societies 
In an intrinsic semiconductor relation between number of free electrons (ne) in conduction band and holes (nh) in valence band is given by:
Consider the following statements: 1. Fermi level in a p-type semiconductor lies close to the top of the valence band. 2. The forbidden energy in Germanium at 0 K is exactly 0.78 eV. 3. When a p-n junction is reverse biased, then electrons and holes move away from the junction. Which of these statements are correct?
How many electrons are there in the valence shell of all semiconductor elements?
How many electrons are there in the valence shell of a pure semiconductor?
For a semiconductor to be called as p-type semiconductor, which one of the following element impurities are added to a pure semiconductor ?