Electrical Engineering · Question Bank
Electronics
433 questions · page 22 of 22. Answer in your head first, then check the solution.
#421📘 EE Pocket Reviewer RojasEasy
Which of the following is true about the electrons in the conduction band?
AIt has a higher energy than the electrons in the valence band
BIt has a lower energy than the electrons in the valence band
CThe electrons will lose their charges easily
DThe electrons will gain more charges
#422📘 EE Pocket Reviewer RojasEasy
Which one refers to the amount of time between the creation of a hole and its disappearance?
ALifetime
BCoping
CRecombination
DBreaktime
#423📘 EE Pocket Reviewer RojasEasy
Holes are the minority carriers in which type of semiconductors?
AExtrinsic
BIntrinsic
CN-type
DP-type
#424📘 EE Pocket Reviewer RojasEasy
What is the temperature coefficient of resistance of a pure semiconductor material?
AZero
BEqual to 1
CPositive value
DNegative value
#425📘 EE Pocket Reviewer RojasEasy
What is the purpose of a pentavalent impurity in a semiconductor?
ATo reduce the conductivity of the silicon
BTo increase the number of electrons
CTo create minority carrier
DTo increase the number of holes
#426📘 EE Pocket Reviewer RojasEasy
The major part of the current in an intrinsic semiconductor is due to which one?
AConduction band electrons
BValence band electrons
CHoles in the valence band
DThermally generated electrons
#427📘 EE Pocket Reviewer RojasEasy
The dynamic conductance of a PN junction is directly proportional to which of the following?
AApplied voltage
BTemperature
CCurrent
DThermal voltage
#428📘 EE Pocket Reviewer RojasEasy
Which of the following atomic particles is found in the nucleus of an atom?
AElectrons and protons
BProtons and neutrons
CElectrons and neutrons
DElectrons, protons and neutrons
#429📘 EE Pocket Reviewer RojasEasy
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?
ADoping
BFree electrons
CThermal energy
DValence electrons
#430📘 EE Pocket Reviewer RojasEasy
An N-type semiconductor material is formed by doping which type of atoms?
APentavalent atom
BHexavalent atom
CTrivalent atom
DTetravalent atom
#431📘 EE Pocket Reviewer RojasEasy
When a voltmeter is placed across a forward-biased diode, it will read approximately what voltage?
AZero voltage
BEqual to the total supply voltage
CEqual to the diode barrier potential
DA voltage out of the range of the voltmeter
#432📘 EE Pocket Reviewer RojasEasy
What will happen if a PN junction is reverse biased?
AElectrons and holes will stop to move
BElectrons and holes move away from the junction
CElectrons and holes move towards the junction
DThe depletion region decreases
#433📘 EE Pocket Reviewer RojasEasy
What do you call the element used in semiconductor technology whose atoms have five valence electrons?
AAcceptor
BDonor
CCollector
DEmitter
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