Question

Please answer the following questions:

A. -------- energy is the name of the energy corresponding to the highest filled electron state at 0K?

B. Electrons in metals do not require any excitation before becoming conduction electrons that are free. True or false?

C. For nonmetallic materials, which of the following is true?

1. The wider the band gap, the higher the electrical conductivity at a given temperature.

2. The wider the band gap, the lower the electrical conductivity at a given temperature.

3. Can't say.

Answer 1

Theory: all these questions are related to electrons, their properties and their concepts. These are very genric statements which are very important concepts mentioned in text books.

Solution:

A) It is called the fermi Energy. Fermi energy is the energy which corresponds to highest filled elctrons at 0K. At 0 K free electrons in thhe solid are used to fill uup the available energy levels.

B) This is false. Without exciation, electrons cannot become conductive. So exciation of electrons is must before conduction.

C) If nonmetallic materials have more (wider) band gap, their electrical conductivity will be higher. SO option 1 should be correct.

let me know if you have any further query.