Easy Electronics Questions – Electrical Engineering (Page 17)

#321📘 reviewer_appEasy

The crystal oscillator frequency is very stable due to _____ of the crystal.

Arigidity

Bductility

Chigh Q

Dlow Q

#322📘 reviewer_appEasy

What application where one would most likely find a crystal oscillator?

Aradio transmitter

BAF generator

Cradio receiver

Doscilloscope

#323📘 reviewer_appEasy

What is the most important consideration in power amplifiers?

Acollector efficiency

Bbiasing the circuit

Cto keep the transformer cool

Damplifier distortion

#324📘 reviewer_appEasy

When the gain versus frequency curve of a transistor amplifier is not flat, _____ distortion is present.

Aamplitude

Bfrequency

Cintermodulation

Dphase

#325📘 reviewer_appEasy

In a Colpitt's oscillator, feedback is obtained

Aby magnetic induction

Bby a tickler coil

Cfrom the center of split capacitors

Dfrom the center of split capacitors

#326📘 reviewer_appEasy

The output signal of a CE amplifier is always

Aout of phase with the input signal

Bequal to the input signal

Cin phase with the input signal

Dlarger than the input signal

#327📘 reviewer_appEasy

What is the purpose of capacitors in a transistor amplifier?

Ato protect the transistor

Bto cool the transistor

Cthe couple or bypass ac component

Dto provide biasing

#328📘 reviewer_appEasy

When CE configuration is used for an oscillator, the voltage fed back must

Abe inverted by 180 degrees

Bbe taken from a capacitor

Chave a 0 degree phase shift

Dtaken from an inductor

#329📘 reviewer_appEasy

Class B operation has a maximum possible efficiency of _____ percent.

A100%

B78.5%

C75%

D2.2%

#330📘 reviewer_appEasy

The most stable sine-wave oscillator which uses piezo-electric quartz crystal.

ACrystal oscillator

BWien-bridge oscillator

CDC restorer

DHartley and Colpitts oscillator

#331📘 reviewer_appEasy

To sustain oscillations, the power gain of the amplifier may be

Abetween 0.1 and 0.5

Bany value from 0.5 upward

Cequal to or greater than 1

Dinfinite

#332📘 reviewer_appEasy

In a phase-shift oscillator, 180 degrees phase shift is obtained by

Aa transformer

BLC tank circuit

Cthree RC sections

Dthree LC sections

#333📘 reviewer_appEasy

Feedback circuit usually employs _____ network.

Aresistive

Binductive

Ccapacitive

Dactive

#334📘 reviewer_appEasy

Emitter follower is used for

Aimpedance matching

Bvoltage gain

Ccurrent gain

Dpower gain

#335📘 reviewer_appEasy

One of the items below is a characteristic of cascaded amplifiers?

Adoubled transconductance

Btotal gain is lessen

Cincreased overall gain

Dincreased overall amplification ratio

#336📘 reviewer_appEasy

Logic analyzer is used to

Averify the logic operation of the gates in a circuit

Bto display the fall time

Cto sample and display systems signal

Dto analyze the logic operation of the system

#337📘 reviewer_appEasy

Quartz crystal is most commonly used in crystal oscillator because

Ait is easily available

Bit has superior electrical properties

Cit is quite inexpensive

Dit is very rugged

#338📘 reviewer_appEasy

The operating frequency of a Wien-bridge oscillator is given by

A1/(2pi sqrt(LC))

B1/(2piRC)

C1/(4piLC)

D1/(29RC)

#339📘 reviewer_appEasy

Which operation gives the maximum distortion?

Aclass A

Bclass C

Cclass B

Dclass AB

#340📘 reviewer_appEasy

Low efficiency of a power amplifier results in

Alow forward bias

Bless battery consumption

Cmore battery consumption

Dlow power output

More Electrical Engineering topics