Practice Circuit Diagram And Initial Conditions (92.1.2) - Feedback system (Part-C)

Practice: Circuit Diagram and Initial Conditions

Lesson 92.1.2Feedback system (Part-C)

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9 questions

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6 sample questions

Question 1.
What is the effect of negative feedback on an amplifier?
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Think about how feedback interacts with amplifier outputs.
Question 2.
Define input resistance.
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Consider it as the opposition to the incoming signal.
3Question 3.
What is the effect of negative feedback on system gain?
- Increases gain
- Decreases gain
- No effect
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Consider what feedback does within the circuit.
4Question 4.
True or False: The input resistance of an ideal feedback system is zero.
- True
- False
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Think about what happens to signals entering the system.
Question 5.
A voltage amplifier has a gain of 10 with a feedback factor of 0.1. Calculate the new input resistance if the original input resistance is 1kΩ.
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Use the basic formula for feedback input resistance.
Question 6.
Explain how adding a load resistance of 500Ω affects the output resistance of a feedback amplifier with an original output resistance of 200Ω.
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Think about how resistances combine in parallel and the principle of superposition.

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