⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs331
1 db corresponds to_____________change in power level?
A50%
B35%
C26%
D22%
332
The lower and upper cut off frequencies are also called_____________frequencies?
ASideband
BResonant
CHalf-resonant
DHalf-power
333
The ear is not sensitive to___________?
AFrequency distortion
BAmplitude distortion
CFrequency as well as amplitude distortion None of the above
334
Transformer coupling provides high efficiency because___________?
ACollector voltage is stepped up
Bresistance is low
Ccollector voltage is stepped down
Dnone of the above
335
The noise factor of an ideal amplifier expressed in db is_____________?
A0
B1
C1
D10
336
Transformer coupling is used for__________amplification?
APower
BVoltage
CCurrent
DNone of the above
337
The best frequency response is of_____________coupling?
ARC
BTransformer
CDirect
DNone of the above
338
In obtaining the frequency response curve of an amplifier, the______________?
AAmplifier level output is kept constant
BAmplifier frequency is held constant
CGenerator frequency is held constant
DGenerator output level is held constant
339
In an RC coupling scheme, the coupling capacitor CC must be large enough______________?
ATo pass
BNot to attenuate the low frequencies
CTo dissipate high power
DNone of the above
340
When a multistage amplifier is to amplify d.c. signal, then one must use_____________coupling?
ARC
BTransformer
CDirect
DNone of the above