A Best Way To Crack Gorenment Job Exams

Electronics Engineering Objective Questions { BJT Amplifiers and Oscillators }



225. The bandwidth of a single stage amplifier is that of a multistage amplifier.
A. more than
B. the same as
C. less than
D. data insufficient
Discussion
226.  The value of emitter capacitor CE in a multistage amplifier is about
A. 0.1 1.LF
B. 100 pF
C. 0.01 tiF
D. 50 1.1.F
Discussion
227.  When negative voltage feedback is applied to an amplifier, its voltage gain
A. is increased
B. is reduced
C. remains the same
D. none of the above
Discussion
228.  The value of negative feedback fraction is always
A. less than 1
B. more than 1
C. equal to 1
D. none of the above
Discussion
229. If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is
A. 10
B. 0.1
C. 0.01
D. 0.15
Discussion
230.  The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become
A. 101.5 db
B. 300 db
C. 103 db
D. 97 db
Discussion
231. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative voltage feedback is approximately
A. 500
B. 100
C. 1000
D. 5000
Discussion

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