What are the majority carriers of electric current in Borond

What are the majority carriers of electric current in Boron-doped Silicon? Holes Electrons Boron ions Silicon atoms Cold-worked aluminum has a higher electrical resistivity than annealed aluminum. This is because cold-worked Al has a higher strength so the resistivity is increased cold-worked Al has a higher dislocation density so the resistivity is increased the martensite that forms in cold-worked Al naturally has a higher resistivity the grains are aligned from cold-work and the alignment causes the resistivity to increase The addition of a boron (B) impurity to otherwise pure silicon (Si) will Decrease conductivity due to additional scattering of electrons due to the impurity Create an additional allowable energy level inside the band-gap called an acceptor level Create an extrinsic semiconductor with the majority charge carrier being a hole instead of an electron All of the above A and B only A and C only B and C only What would you predict would result from adding a small amount of nitrogen (called \"doping\") to an otherwise pure silicon material? The nitrogen impurity will increase resistivity Nitrogen will create vacancies that will decrease resistivity Nitrogen is a gas and should have no impact on the electronic properties of the silicon Nitrogen will create a \"donor level\" in the band structure that results in an n-type extrinsic semiconductor Nitrogen will create an \"acceptor level\" in the band structure that results in a p-type extrinsic semiconductor Nitrogen will make the silicon more intrinsic which will cause a decrease in resistivity Assuming the electrical conductivity of pure silver is higher than pure copper, what would you predict would result from adding -0.5wt% silver to an otherwise pure copper material? Conductivity will increase Conductivity will decrease Conductivity will not change It\'s impossible to predict without more information Resistance is a measure of performance while resistivity is a material property. Resistivity of a metal will increase with increasing temperature. Resistivity of an intrinsic semiconductor will increase with increasing temperature. It\'s possible for a compound semiconductor to exhibit intrinsic behavior. The band structures for electrical insulators and semiconductors are similar except for the magnitude of the band gap.

Solution

Ans1 .(a)

2.(a)

3.(g)

4.(b)

5(b)

6. T

7. F

8. F

9.T

10.F