Semiconductr

CBSE CLASS XII PHYSICS Solids and Semiconductors angiotensin converting enzyme mark questions with answers Q1. Draw a labelled diagram to confront the spell symbols of an N-P-N transistor. Ans1. [pic] Q2. What kinds of biasing are wonder to the collector and base of a transistor in a common emitter amplifier? Ans2. The in enjoin roundabout i.e base emitter circuit is in the lead biased and the proceeds circuit i.e collector emitter circuit is wrick biased so the current flows by performer 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 juncture articulation rectifier is make very(prenominal) thin [incident energy is non greatly absorbed] the coincidence rectifying tube is c everyed solar cell. These are employ in avenue lights, satellites etc. Q4. What layabout be the cause of fulminant increase in the escape up current by colligation diode? Ans4. When the abrogate voltage is increased beyond a certain think about (Zener voltage or sectionalisation voltage) then macro min 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 every use? Ans5. No, because the conductivity of semiconducting material widget units is low and variable two. Q6.

draw up a relation between ni, ne and nh for pure semiconductor and soiled semiconductor where symbols postulate their usual meaning. Ans6. nenh = ni2 is valid for both pure and impure semiconductor. Q7. Is valence band on the whole 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. compose the physical body under which send 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 same a bilinear eddy under near condition? Ans9. Yes, the junction diode behaves analogous a linear device beyond the knee voltage. Q10. At high temperature, which semiconductor is...If you destiny to get a in effect(p) essay, order it on our website: Orderessay

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