quantum physics question please help \
Posted: Mon Jul 11, 2022 1:04 pm
quantum physics question please help \
Question 2 Consider a crystal in 3 dimensions, in which each unit cell contributes Zvalence electrons and there are N unit cells (ons) per band. Which of the following is true? O For Zodd, the crystal is an insulator or conductor For Zodd, the crystals conductor The total number of electrom in a single band is an odd multiple of N if there are no portially filled bands Week 11 Tutorial Quiz This is a preview of the published version of the quiz Started: 16 Jun at 16:54 Quiz instructions Indicate the correct answer from the options provided. Question 3 Considera crystal in 3 dimensions, in which each unit cell contributes Z valence electrons and there are N unit cells (ons) per band. Which of the following is true? For Zeven, the crystal is a an insulator or conductor Not saved The total number of electrons in a single band is an odd multiple of N if all the bands are completely filled ⒸZ cannot be an odd number 3 pts Next Submit qui 3 pts
Question 1 What are some reasons for why it is difficult in changing an insulator material into a conductor by heating it? Choose all the answers you feel are correct. An insulator only has a partially filled conduction band The insulator would undergo phase changes before conduction The electrons in an insulator have too large an effective mass The unit cells in an insulator are too far apart There are too many holes in the conduction band An insulator has a fully occupied valance band The energy gap between the conduction and valence bands is very large Quiz instructions Answer the following MCQ's. There may be more than one correct answer. Question 2 Conduction of electricity in a semiconductor occurs because: (Select all correct answers) Electrons are present in the valence band Electrons carry the current and holes try to cancel it 3 pts Electrons and holes carry current The band gap energy is less than the thermal energy required for a phase change A completely filled valence band allows electrons to "bump" each other more effectively for a high current Electrons are present in the conduction band The semiconductor becomes superconducting at very low temperatures near OK Next 3 pts
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Question 1 What are some reasons for why it is difficult in changing an insulator material into a conductor by heating it? Choose all the answers you feel are correct. An insulator only has a partially filled conduction band The insulator would undergo phase changes before conduction The electrons in an insulator have too large an effective mass The unit cells in an insulator are too far apart There are too many holes in the conduction band An insulator has a fully occupied valance band The energy gap between the conduction and valence bands is very large Quiz instructions Answer the following MCQ's. There may be more than one correct answer. Question 2 Conduction of electricity in a semiconductor occurs because: (Select all correct answers) Electrons are present in the valence band Electrons carry the current and holes try to cancel it 3 pts Electrons and holes carry current The band gap energy is less than the thermal energy required for a phase change A completely filled valence band allows electrons to "bump" each other more effectively for a high current Electrons are present in the conduction band The semiconductor becomes superconducting at very low temperatures near OK Next 3 pts