⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs321
The value of collector load RC in a transistor amplifier is _______________the output impedance of the transistor?
AThe same as
BLess than
CMore than
DNone of the above
322
The output power of a transistor amplifier is more than the input power because the additional power is supplied by__________________?
ATransistor
BBiasing circuit
CCollector supply VCC
DNone of the above
323
A transistor amplifier has high output impedance because ______________?
AEmitter is heavily doped
BCollector has reverse bias
CCollector is wider than emitter or base
DNone of the above
324
CC configuration is used for impedance matching because its ________________?
AInput impedance is very high
BInput impedance is low
COutput impedance is very low
DNone of the above
325
The purpose of RC or transformer coupling is to_____________?
Ac.
BSeparate bias of one stage from another
CIncrease thermal stability None of the above
326
The value of emitter capacitor CE in a multistage amplifier is about____________?
A1 µF
B100 pF
C0.01 µF
D50 µF
327
RC coupling is generally confined to low power applications because of____________?
ALarge value of coupling capacitor
BLow efficiency
CLarge number of components
DNone of the above
328
An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?
A8 db
B6 db
C5 db
D4 db
329
The gain of an amplifier is expressed in db because_____________?
AIt is a simple unit
BCalculations become easy
CHuman ear response is logarithmic
DNone of the above
330
The frequency response of transformer coupling is___________?
AGood
BVery good
CExcellent
DPoor