Q1: write down the main properties of semiconductors
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- A noncontributory semiconductor has some holes in room temperature. What causes these holes?Please select one:a.Valuation electronsb.Dopingc.Free electronsd.Thermal energyA semiconductor is formed by ......... bonds. 1. Covalent 2. Electrovalent 3. Co-ordinate 4. None of the aboveAn intrinsic semiconductor has some holes in it at room temperature. What causes these holes? Group of answer choices a.) Valence electrons b.) Thermal energy c.) Doping d.) Free electrons
- How many valence electrons does a semiconductor has? a. 2 b. 3 c. 6 d. 4 When pure semiconductor is heated, its conductance a. Goes up b. Goes down C. Remains the same d. Can't say When a trivalent impurity is added to a pure semiconductor, it becomes a. A conductor b. An intrinsic semiconductor C. P-type semiconductor d. N-type semiconductorThis type of semiconductor is characterized by its electrical behavior based on pure material while the this type of semiconductor has electrical characteristics dictated by impurity atoms. B. Extrinsic semiconductor; intrinsic semiconductor D. All of the above C. None of the above A. Intrinsic semiconductor; extrinsic semiconductor Other:+Explain, what is the potential barrier in semiconductors. Note: no need to give an exact definition, please explain it in an easy way.
- When a pure semiconductor is heated, its resistance .............. 1. Goes up 2. Goes down 3. Remains the same 4. Can't sayIncludes a p-type semiconductor, holes and ...... Please choose one: A) pentavalent atoms B) donor atoms C) positive ions D) negative ionsSuppose we just connected an n type and p type semiconductor together. What happens at the junction? Briefly explain with appropriate figure.
- 1. Justify the following statements. (1) The nett charge of an n-type semiconductor is not negative, but zero. (ii) In the p-type semiconductor, current flow occurs by movement of positive charges (holes) although the only moving particles are electron.Choose the doping material that will cause silicon to become a p-type semiconductor. A. Ge B. As C. Te D. BIn a doped semiconductor, Please choose one: a. there are only holes b. there are as many electrons as holes c. no free electrons D. free electrons are generated thermally to. answers B. and D.