Electrical Engineering MCQs

Page No. 31

The stability factor of a collector feedback bias circuit is_______________ that of base resistor bias?


aThe same as


bMore than


c Less than


dNone of the above


View Answer Less than

If the temperature increases, the value of VCE_________________?


aRemains the same


b Is increased


cIs decreased


dNone of the above


View Answer Is decreased

The value of stability factor for a base resistor bias is________________?


aRB (ß+1)


b(ß+1)RC


c(ß+1)


d1-ß


View Answer (ß+1)

In voltage divider bias, VCC = 25 V; R1 = 10 kO; R2 = 2.2 V ; RC = 3.6 V and RE =1 kO. What is the emitter voltage?


a7 V


b3 V


cV


d8 V


View Answer 8 V

In voltage divider bias, operating point is 3 V, 2 mA. If VCC = 9 V, RC = 2.2 kO, what is the value of RE ?


a2000 O


b 1400 O


c800 O


d1600 O


View Answer 800 O

The disadvantage of voltage divider bias is that it has _________________?


aHigh stability factor


b Low base current


cMany resistors


dNone of the above


View Answer Many resistors

For proper amplification by a transistor circuit, the operating point should be located at the_____________ of the d.c. load line?


aThe end point


bMiddle


cThe maximum current point


dNone of the above


View Answer Middle

Thermal runaway occurs when_________________?


aCollector is reverse biased


bTransistor is not biased


cEmitter is forward biased


dJunction capacitance is high



The operating point ________________ on the a.c. load line?


a Also line


b Does not lie


cMay or may not lie


dData insufficient


View Answer Also line

The operating point is also called the _______________?


aCut off point


bQuiescent point


cSaturation point


d None of the above


View Answer Quiescent point

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