ASSIGNMENT No. 6 Q1. a. Comment on the concept of effective mass of charge carriers in a semiconductor. Why is gallium a

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ASSIGNMENT No. 6Q1.a. Comment on the concept of effective mass of charge carriers in asemiconductor.Why is gallium arsenide used in high frequency power electronicsdevices?b. A piece of 0.06 Ω.m p-type silicon has carrier drift velocity of3 s 2 10 ms  in anapplied electric field of 5 1 10 Vm . Calculate the majoritycarrier concentrationin this piece of silicon.3Q2.a. Comment on any three commonly used semiconductor materials inrespect oftheir production methods and application in devicefabrication.b. The concentration of acceptor atoms in a bar of silicon is 21 3m 10 4   . If thedensity of the current flowing in the bar is 6 2 m A 10 / , findthe average driftvelocityQ3. Write brief notes on the following:a. Intrinsic semiconductorb. Extrinsic semiconductorc. Semi insulating semiconductor, and give on example of a semiinsulatingsemiconductor