MCQ 11 MarkExamples of inorganic semiconductors is:AGe✓CdSCanthraceneDpolyanilieAnswerCorrect option: B. CdS(b) - CdSView full question & answer→
MCQ 21 MarkA diode as a rectifier changes :Ain alternating current of direct current✓alternating current into direct currentChigh voltage to low voltage or low voltage to high voltageDchanging direct current into fixed direct currentAnswerCorrect option: B. alternating current into direct current(b) - alternating current into direct currentView full question & answer→
MCQ 31 MarkConduction occurs in semiconductors :Aunipolar✓bipolarCtripolarDnon-polarAnswerCorrect option: B. bipolar(b) - bipolarView full question & answer→
MCQ 41 MarkWhich of the following is an atom donor impurity?AAlBBCGa✓PAnswerCorrect option: D. P(d) - PView full question & answer→
MCQ 51 MarkP-N diode is :Alinear device✓nonlinear deviceCthermal deviceDnone of theseAnswerCorrect option: B. nonlinear device(b) - nonlinear deviceView full question & answer→
MCQ 61 MarkThe ratio of resistance in forward and reverse bias arrangements in a $P - N$ junction diode is :A$10^2: 1$B$10^{-2}: 1$✓$1: 10^4$D$1: 10^{-4}$AnswerCorrect option: C. $1: 10^4$(c) - $1: 10^4$View full question & answer→
MCQ 71 MarkFor P-type semiconductors, impurity elements are used :AArsenicBPhosphorus✓BoronDBismuthAnswerCorrect option: C. Boron(c) - BoronView full question & answer→
MCQ 81 MarkThe ratio of the number of electrons and holes in intrinsic semiconductors at normal temperature is :A$1: 2$B$2: 1$✓$1: 1$D$1: 3$AnswerCorrect option: C. $1: 1$(c) - $1: 1$View full question & answer→
MCQ 91 MarkConductivity of semiconductors due to increase in temperature :Aremains unchanged✓decreasesCincreasesDfirst decreases and then increasesAnswerCorrect option: B. decreases(b) - decreasesView full question & answer→
MCQ 101 MarkBonds in semiconductors are :AionicBmetallicCVan der Waals✓covalentAnswerCorrect option: D. covalent(d) - covalentView full question & answer→
MCQ 111 MarkConductivity of semiconductors:Adoes not depend on temperatureBdecreases with increase in temperature✓increases with temperature increaseDfirst decreases and then increasesAnswerCorrect option: C. increases with temperature increase(c) - increases with temperature increaseView full question & answer→
MCQ 121 MarkWhich of the following statements is false?AThe resistance of which semiconductor decreases with increase in temperature?BThe displacement of the hole in the electric field is in the opposite direction to the displacement of the electron.✓The resistance of a conductor decreases as temperature increases.DAll types of semiconductors are uncharged.AnswerCorrect option: C. The resistance of a conductor decreases as temperature increases.(c) - The resistance of a conductor decreases as temperature increases.View full question & answer→
MCQ 131 MarkIdeal $P - N$ junction can be used :Aas an amplifier✓as a rectifierCin the form of oscillatorDas a modulatorAnswerCorrect option: B. as a rectifier(b) - as a rectifierView full question & answer→
MCQ 141 MarkWhen the impurity of arsenic is added to the pure semiconductor germanium, it will be present :AP-type semiconductor✓N-type semiconductorCConductorDP-N junctionAnswerCorrect option: B. N-type semiconductor(b) - N-type semiconductorView full question & answer→
MCQ 151 MarkSpecific resistance of a semiconductor on increasing temperature :Aincreases✓decreasesCremains unchangedDfirst decreases and then increasesAnswerCorrect option: B. decreases(b) - decreasesView full question & answer→
MCQ 161 MarkAn N-type semiconductor is:Anegatively chargedBpositively charged✓insulatorDnone of theseAnswerCorrect option: C. insulator(c) - insulatorView full question & answer→
MCQ 171 MarkWhich of the following statements is incorrect?AImpurity semiconductor is called extrinsic semiconductor.BBoth hole and electron are charge carriers.CElectrons are minority charge carriers in P-type semiconductor.✓Holes in P-type semiconductor are minority charge carriers.AnswerCorrect option: D. Holes in P-type semiconductor are minority charge carriers.(d) - Holes in P-type semiconductor are minority charge carriers.View full question & answer→
MCQ 181 MarkThe function of rectifier is :Ato amplify the currentBto amplify the voltageCconverting direct current into alternating current✓converting alternating current into direct currentAnswerCorrect option: D. converting alternating current into direct current(d) - converting alternating current into direct currentView full question & answer→
MCQ 191 MarkOn installing forward bias on $P - N$ junction, its behavior will be :✓like a conductorBlike a semiconductorClike mechanical valveDlike a superconductorAnswerCorrect option: A. like a conductor(a) - like a conductorView full question & answer→
MCQ 201 MarkTo make P type semiconductor in silicon :AMixing substance of fifth group✓Add substances of third groupCMixing substances of group IVDSubstances of any group can be mixedAnswerCorrect option: B. Add substances of third group(b) - Add substances of third group View full question & answer→
MCQ 211 MarkThose substances whose valence band and conduction band are almost in a state of overlap are :✓ConductorBDielectricCSemiconductorsDAll of theseAnswerCorrect option: A. Conductor(a) - ConductorView full question & answer→
MCQ 221 MarkIn an insulator, the forbidden energy gap between valence band and conduction band is of the following order :A1 eV✓6 eVC20 eVD0.01 eVAnswerCorrect option: B. 6 eV(b) - 6 eVView full question & answer→
MCQ 231 MarkAt absolute zero temperature, there are negatives germanium and negative silicon are :AsuperconductorBgood semiconductor✓ideal insulatorDconductorAnswerCorrect option: C. ideal insulator(c) - ideal insulatorView full question & answer→
MCQ 241 MarkPlate resistance when saturated current flows in the diode $r_p$ is :Azero✓infiniteCa certain numberDdata is inadequateAnswerCorrect option: B. infinite(b) - infiniteView full question & answer→
MCQ 251 MarkThe depletion region of a $P - N$ junction consists of :Aonly electronsBonly holeCboth electron and hole✓neutral ionAnswerCorrect option: D. neutral ion(d) - neutral ionView full question & answer→