BJT Amplifiers and Oscillators MCQs
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 1easy
A transistor with hie = 1.5 K and hie = 75 is used in an emitter follower circuit where R1 and R2 are used for normal biasing. Approximate value of its current amplification is
Question 2easy
A certain percentage of negative feedback does not yield a fixed reduction in gain because it depends on
Question 3easy
If the feedback factor of an amplifier is 0.1 and gain without feedback is 40, then its gain with feedback is
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Question 4easy
Regarding improvements obtained by using negative voltage feedback which statement is false?
Question 5easy
An amplifier has a bandwidth of 20 kHz and a midband gain of 50 without feedback. If a negative feedback of 1% is applied, than bandwidth with feedback is ?kHz.
Question 6easy
An amplifier without feedback has a distortion of 15% and gain of 40. When 10% negative feedback is applied, the distortion will become ?percent.
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Question 7easy
In an audio amplifier, audio signals become garbled and hence difficult to understand when ac input current is large enough to drive the output to