Objective Electronics Questions – Electrical Engineering (Page 20)

#381📘 reviewer_appEasy

Which operation gives the maximum distortion?

Aclass A

Bclass C

Cclass B

Dclass AB

#382📘 reviewer_appEasy

Low efficiency of a power amplifier results in

Alow forward bias

Bless battery consumption

Cmore battery consumption

Dlow power output

#383📘 reviewer_appEasy

In an LC oscillator, the frequency of oscillations is given by

A1/(2pi sqrt(LC))

B2pi/ sqrt(LC)

Csqrt(LC)/2pi

D2pi/ sqrt(LC)

#384📘 reviewer_appEasy

Class A operation has a maximum possible efficiency of _____ percent

A100%

B50%

C75%

D25%

#385📘 EE Pocket Reviewer RojasEasy

What is the reason why conduction electrons have more mobility than the holes?

AThey are lighter

BThey have negative charge

CThey need less energy to move

DThey experience collisions less frequently

#386📘 EE Pocket Reviewer RojasEasy

Which of the following devices cannot convert dc to ac?

ARectifiers

BVoltage regulators

COscillators

DAmplifiers

#387📘 EE Pocket Reviewer RojasEasy

Zener diodes are used primarily as

ARectifiers

BVoltage regulators

COscillators

DAmplifiers

#388📘 EE Pocket Reviewer RojasEasy

Which of the following diodes is often used for voltage regulation in electronic circuits?

AZener

BVaractor

CSilicon

DTunnel

#389📘 EE Pocket Reviewer RojasEasy

Which of the following is not a source of power?

AThermocouple

BPhotovoltaic cell

CSolar cell

DPhotoelectric cell

#390📘 EE Pocket Reviewer RojasEasy

Which of the following terms refers to the actual resistance of a semi-conductor material?

AIntrinsic resistance

BBulk resistance

CBreakdown resistance

DDynamic resistance

#391📘 EE Pocket Reviewer RojasEasy

Which of the following statements is correct about intrinsic semiconductors?

AThey have more electrons than holes

BThey are semi-conductors in purest form

CThey are locally available

DThey have zero energy gap

#392📘 EE Pocket Reviewer RojasEasy

Holes act like ____.

AAtoms

BCrystals

CNegative charges

DPositive charges

#393📘 EE Pocket Reviewer RojasEasy

Which of the following terms describes an atom which has either gained or lost electrons?

AExcited

BBonded

CIonized

DDiffused

#394📘 EE Pocket Reviewer RojasEasy

In a semiconductor, the current is produced by which of the following?

APositive ions

BElectrons only

CNegative ions

DBoth electrons and holes

#395📘 EE Pocket Reviewer RojasEasy

What is purpose of doping an intrinsic semiconductor?

ATo increase their conductance

BTo increase their reactance

CTo increase their inductance

DTo increase their resistance

#396📘 EE Pocket Reviewer RojasEasy

Which of the following is an acceptor impurity element?

AAntimony

BArsenic

CGallium

DPhosphorus

#397📘 EE Pocket Reviewer RojasEasy

What causes the depletion region of a semiconductor diode?

AReverse biasing

BForward biasing

CCrystal doping

DMigration of mobile charge carriers

#398📘 EE Pocket Reviewer RojasEasy

Which one is the most used semi-conductor material?

ABoron

BSilicon

CGermanium

DCarbon

#399📘 EE Pocket Reviewer RojasEasy

The term “recombination” takes place when?

AAn electron falls into a hole

BA positive and a negative ion bond together

CAn electron escape from the valence orbit

DA crystal is formed

#400📘 EE Pocket Reviewer RojasEasy

Which one refers to the voltage connected across a PN junction?

ABreakdown voltage

BBarrier voltage

CBias voltage

DPeak inverse voltage

More Electrical Engineering topics