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Find the utilize of an NPN common emitter transistor, bandwidth of an amplifier, and advantage of direct - coupled amplifier.

1. An NPN common emitter transistor, when operated without d-c bias, can be used as a?
A) d-c restorer
B) Negative peak clipper
C) Positive peak clipper
D) Baseline stabilizer

2. What is the bandwidth of an amplifier that produces a square wave with a rise time of 2 msec? (Microseconds)
A) 20 kHz
B) 57 kHz
C) 70 kHz
D) 175 kHz

3. An advantage of direct - coupled amplifiers is that they?
A) Make ideal clippers
B) Make ideal limiters
C) Can amplify a signal without inverting it
D) Can amplify a signal without changing its d-c reference level

• Category:- Physics
• Reference No.:- M917274

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