1. 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
2. A certain percentage of negative feedback does not yield a fixed reduction in gain because it depends on
3. If the feedback factor of an amplifier is 0.1 and gain without feedback is 40, then its gain with feedback is
4. Regarding improvements obtained by using negative voltage feedback which statement is false?
5. 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.
6. An amplifier without feedback has a distortion of 15% and gain of 40. When 10% negative feedback is applied, the distortion will become ?percent.
7. 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
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