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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define input resistance in a feedback amplifier.
π‘ Hint: Think about where the signal first enters the amplifier.
Question 2
Easy
What does the feedback ratio (Ξ²) represent?
π‘ Hint: Consider how much of the signal is reused.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the formula for calculating modified input resistance in a feedback amplifier?
- R = R(1 - Ξ²A)
- R = R(1 + Ξ²A)
- R = R - R_0
π‘ Hint: Remember the role of feedback in amplifying resistances.
Question 2
True or False: Feedback increases stability in amplifier circuits.
- True
- False
π‘ Hint: Think about the effects of feedback on circuit behavior.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a voltage amplifier with R = 1000Ξ© and Ξ² = 0.1, A = 10. Calculate the input resistance with feedback.
π‘ Hint: Break down the formula step by step.
Question 2
Explain how a finite feedback resistance affects the desensitization factor in a feedback loop.
π‘ Hint: Relate this back to the essential role of feedback in amplifiers.
Challenge and get performance evaluation