⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs241
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
242
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
B1400 O
C800 O
D1600 O
243
The disadvantage of voltage divider bias is that it has _________________?
AHigh stability factor
BLow base current
CMany resistors
DNone of the above
244
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
245
Thermal runaway occurs when_________________?
ACollector is reverse biased
BTransistor is not biased
CEmitter is forward biased
DJunction capacitance is high
246
The operating point ________________ on the a.c. load line?
AAlso line
BDoes not lie
CMay or may not lie
DData insufficient
247
The operating point is also called the _______________?
ACut off point
BQuiescent point
CSaturation point
DNone of the above
248
For good stabilsation in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than_____________?
A10 IB
B3 IB
C2 IB
D4 IB
249
The disadvantage of base resistor method of transistor biasing is that it_________________?
AIs complicated
BIs sensitive to changes in ß
CProvides high stability
DNone of the above
250
An ideal value of stability factor is________________?
A100
B200
CMore than 200
D1