BJT Amplifiers and Oscillators MCQs

446 questionsElectronics-EngineeringPage 6 of 50

Practice free BJT Amplifiers and Oscillators multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 446 questions — no login required.

Question 46easy
The signal/noise (SIN) ratio of an amplifier developing an output voltage of 10V and a noise voltage of 1 mV is ____ dB.
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Question 47easy
The power gain of an amplifier is 80 dB. The half-power frequencies fi and f2 are the frequencies where gain has fallen to ___ dB.
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Question 48easy
The condition fiA = 1 in an amplifier
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Question 49easy
For sustaining oscillations in a feedback amplifier, the loop gain should be
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Question 50easy
The term Av of an amplifier is called
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Question 51easy
A two-transistor class-B amplifier is usually called?amplifier.
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Question 52easy
The noise factor of an ideal amplifier is dB.
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Question 53easy
Which frequency produces the highest noise factor in a transistor?
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Question 54easy
In an ideal Op Amp, the input impedance is
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