An npn BJT has gm=38mA/v, c =10 14 F, c =10 13F and DC current gain 0=90.For this transistor fT & f are________?

FT =1.33 x 1012 Hz & f = 1.47 x 1010 Hz

FT =1.64 x 108 Hz & f = 1.47 x 1010 Hz.

FT =1.47 x 1010 Hz & f = 1.64 x 108 Hz

FT =1.33 x 1012 Hz & f = 1.47 x 1010 Hz

FT =1.47 x 1010 Hz & f = 1.33 x 1012 Hz

Explore topic-wise MCQs in Electrical Engineering Mcqs.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Mcqs knowledge and support exam preparation. Choose a topic below to get started.

1.	An amplifier without feedback has a voltage gain of 50,input resistance os 1 K & Output resistance of 2.5K .The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?
A.	1/11K
B.	1/5K
C.	5K
D.	11K
Answer» B. 1/5K

Discussion

2.	. If =0.98 ,Ico=6 A and I =100 A for a transistor,then the value of Ic will be______?
A.	2.3mA
B.	3.2mA
C.	4.6 mA
D.	5.2mA
Answer» E.

Discussion

3.	An npn BJT has gm=38mA/v, c =10 14 F, c =10 13F and DC current gain 0=90.For this transistor fT & f are________?
A.	FT =1.64 x 108 Hz & f = 1.47 x 1010 Hz.
B.	FT =1.47 x 1010 Hz & f = 1.64 x 108 Hz
C.	FT =1.33 x 1012 Hz & f = 1.47 x 1010 Hz
D.	FT =1.47 x 1010 Hz & f = 1.33 x 1012 Hz
Answer» C. FT =1.33 x 1012 Hz & f = 1.47 x 1010 Hz

Discussion

4.	An amplifier using an opamp with slew rate SR=1v/ sec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed________?
A.	795mV
B.	395mV
C.	795 mV
D.	39.5mV
Answer» D. 39.5mV

Discussion

5.	Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1K & output resistance of 250 ,are cascaded.The open circuit voltage gain of combined amplifier is_________?
A.	49dB
B.	51dB
C.	98dB
D.	102dB
Answer» D. 102dB

Discussion

6.	An OPAMP has a slew rate of 5 V/ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is [Hint: Slew rate is defined as the max. rate of change of output voltage. Its unit is V/ S.
A.	10 volts
B.	5 volts
C.	5/1 volts
D.	5/2 volts
Answer» E.

Discussion

Explore topic-wise MCQs in Electrical Engineering Mcqs.

An amplifier without feedback has a voltage gain of 50,input resistance os 1 K & Output resistance of 2.5K .The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?

. If =0.98 ,Ico=6 A and I =100 A for a transistor,then the value of Ic will be______?

An npn BJT has gm=38mA/v, c =10 14 F, c =10 13F and DC current gain 0=90.For this transistor fT & f are________?

An amplifier using an opamp with slew rate SR=1v/ sec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed________?

Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1K & output resistance of 250 ,are cascaded.The open circuit voltage gain of combined amplifier is_________?

An OPAMP has a slew rate of 5 V/ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is [Hint: Slew rate is defined as the max. rate of change of output voltage. Its unit is V/ S.