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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the effect of negative feedback on input resistance?
π‘ Hint: Think about how feedback stabilizes a circuit.
Question 2
Easy
What does the symbol 'Ξ²' represent in feedback equations?
π‘ Hint: Consider it as how much of the output is fed back.
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 input resistance in a feedback system?
- Rin = Rin(1 + Ξ²A)
- Rin = Rin(Ξ² + A)
- Rin = Rin - (Ξ²A)
π‘ Hint: Look for the equation related to feedback gain.
Question 2
True or False: Negative feedback always decreases input resistance.
- True
- False
π‘ Hint: Consider the definitions of feedback in circuits.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given a feedback system with an input resistance of 500 ohms, feedback factor Ξ² of 0.2, and an amplifier gain A of 5, calculate the new input resistance. Discuss the significance of results.
π‘ Hint: Remember to refer back to the formula for correct operation.
Question 2
Explain how an increase in load resistance affects the performance of a current amplifier using feedback, specifically discussing potential trade-offs.
π‘ Hint: Consider practical scenarios in circuit applications.
Challenge and get performance evaluation