Semiconductr

CBSE CLASS XII PHYSICS Solids and Semiconductors bingle mark questions with answers Q1. Draw a labelled diagram to devote down the spell symbols of an N-P-N transistor. Ans1. [pic] Q2. What kinds of biasing are accept to the collector and base of a transistor in a common emitter amplifier? Ans2. The input enlistment i.e base emitter circuit is in the lead biased and the siding circuit i.e collector emitter circuit is wrick biased so the current flows by agent of D2 only. Q3. What is a solar electric cell and where is it physical exertiond? Ans3. When P-region or N-region of P-N crossroads rectifying valve is make precise thin [incident energy is non greatly absorbed] the coincidence rectifying valve is c whollyed solar cell. These are utilize in avenue lights, satellites etc. Q4. What kitty be the cause of fast increase in the unravel up current by means of combination diode? Ans4. When the rearward(a) voltage is increased beyond a certain think (Zener voltage or segmentation voltage) then monolithic effect of covalent bonds are broken. It results into large electron-hole pairs which diffuse through the sexual union and hence there is a sharp rise in the reverse current. Q5. Can we put pure semiconducting materials to whatever use? Ans5. No, because the conductivity of semiconductor twisting units is low and variable twain. Q6.

indite a relation among ni, ne and nh for pure semiconductor and soiled semiconductor where symbols overhear their usual meaning. Ans6. nenh = ni2 is valid for both pure and impure semiconductor. Q7. Is valence band entirely 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. bring out the delay under which in the lead current flows through the co-occurrence 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 interchangeable a bilinear trick under near condition? Ans9. Yes, the junction diode behaves uniform a linear device beyond the knee voltage. Q10. At high temperature, which semiconductor is...If you motivation to get a full(a) essay, order it on our website: Orderessay

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