Electrical Engineering · Question Bank

Communications

386 of 408 questions match · page 12 of 20. Answer in your head first, then check the solution.

TypeAll 386Problem solvingObjective 386
✕ Clear filters
#221📘 reviewer_appEasy
The bandwidth of a parallel LC circuit can be increased by
AIncreasing Xc
BDecreasing Xl
CDecreasing coil resistance
DA resistor connected in parallel
#222📘 reviewer_appEasy
In a double tuned circuit, and peak output with _____ coupling
Aunder
Bover
Coptimum
Dmedium
#223📘 reviewer_appEasy
In a double-tuned circuit, maximum bandwidth with ______ coupling
Aunder
Bover
Coptimum
Dcritical
#224📘 reviewer_appEasy
Most impedance matching networks are _______ filters, so they eliminate harmonics
Ahigh-pass
Blow-pass
Cbandpass
Dbandstop
#225📘 reviewer_appEasy
The bandwidth of a double-tuned transformer depends upon the degree of __________ between primary and secondary windings
Amutual inductance
Bcoupling factor
Climiting factor
Dfiltering
#226📘 reviewer_appEasy
In double tuned circuit, minimum bandwidth is obtained with _________ coupling
Aunder
Bover
Coptimum
Dcritical
#227📘 reviewer_appEasy
The output frequency of a synthesizer is changed by varying the _____ of the divider between the VCO and the phase detector
AMixer input
BIF output
CFrequency division ratio
DVoltage division ratio
#228📘 reviewer_appEasy
Combining a feedback capacitor with the internal capacitance of the transistor forms a _______ circuit which is used to cancel the self oscillation
Afilter
Btank
Cbridge
Dfeedback
#229📘 reviewer_appEasy
When two-equal frequencies are mixed together, the result is:
Azero-bias
Bzero-beat
Czero-modulation
Doff-beat
#230📘 reviewer_appEasy
It is used to generate many output frequencies through the addition, subtraction, multiplication, and division of a smaller number of fixed frequency sources
Apower amplifier
Bfrequency synchronizer
Coscillator
Dfrequency synthesizer
#231📘 reviewer_appEasy
The multiple output freq are generated by mixing the outputs from two or more crystal-controlled frequency sources or by dividing or multiplying the output frequency from a single-crystal oscillator
Adirect frequency synthesis
Bconstant frequency synthesis
Cindirect frequency synthesis
Dmultiple frequency synthesis
#232📘 reviewer_appEasy
It is minimum frequency separation between output frequencies for the synthesizer
Adynamic range
Bresolution
Coctave
Ddecade
#233📘 reviewer_appEasy
Zero beat is also known as ________
Aphase acquisition
Bloop acquisition
Cpush-in acquisition
Dfrequency acquisition
#234📘 reviewer_appEasy
The _____ gain for a PLL is simply the product of the individual gains or transfer function for the loop
Aloop
Bclosed
Clock
Dcapture
#235📘 reviewer_appEasy
Non-coherent detection is also known as _____________
Afrequency detection
Bnoise detection
Cphase detection
Denvelope detection
#236📘 reviewer_appEasy
IF section is also known as
Abandpass filters
BIF strip
CIF filter
Dintermediate filters
#237📘 reviewer_appEasy
The difference between the actual local oscillator frequency and the desired frequency is called ________
Amixing error
Bgang error
Ctracking error
Dquantizing error
#238📘 reviewer_appEasy
What technique is used to prevent tracking error?
Ausing RLC circuit
Busing tuned circuit
Cusing three-point tracking
Dusing ganged capacitors
#239📘 reviewer_appEasy
Which of the ff is NOT the other name of a balanced modulator?
Abalanced mixer
Bproduct detector
Cproduct modulator
Dnone of these
#240📘 reviewer_appEasy
Low-noise RF amplifiers uses what type of biasing?
Aclass A
Bclass B
Cclass AB
Dclass C

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