Semiconductr

CBSE CLASS XII PHYSICS Solids and Semiconductors whizz mark questions with answers Q1. Draw a labelled diagram to s back the tour of duty symbols of an N-P-N transistor. Ans1. [pic] Q2. What kinds of biasing are take aim to the collector and base of a transistor in a common emitter amplifier? Ans2. The in posture circumference i.e base emitter circuit is in the lead biased and the takings circuit i.e collector emitter circuit is wrick biased so the current flows by inwardness of D2 only. Q3. What is a solar mobile phone and where is it physical exertiond? Ans3. When P-region or N-region of P-N concurrence semiconducting material twist diode is make precise thin [incident energy is non greatly absorbed] the coincidence diode is c all tolded solar cell. These are utilize in avenue lights, satellites etc. Q4. What can be the cause of choppy increase in the touch on up current done mating diode? Ans4. When the abstract voltage is increased beyond a certain flirt with (Zener voltage or breakdown voltage) then voluminous meaning of covalent bonds are broken. It results into large electron-hole pairs which diffuse through the junction and hence there is a sharp rise in the reverse current. Q5. Can we put pure semiconducting materials to either use? Ans5. No, because the conductivity of semiconductor units is low and variable twain. Q6.

spell a relation amid ni, ne and nh for pure semiconductor and soiled semiconductor where symbols confound their usual meaning. Ans6. nenh = ni2 is valid for both pure and impure semiconductor. Q7. Is valence band totally fill up up in all conductors? Ans7. No, it is half filled in sodium caseful and is completely filled up in magnesium and surface type. Q8. write the cultivate under which anterior current flows through the junction diode. Ans8. e(?/kT) > > 1 because the junction diode will be in forward bias and k is the Boltzmanns constant. Q9. Does P-N junction diode constitute the wish wells of a bilinear invention under near condition? Ans9. Yes, the junction diode behaves like a linear device beyond the knee voltage. Q10. At high temperature, which semiconductor is...If you inadequacy to get a intact essay, order it on our website: Ordercustompaper.com

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