Practice Current Amplifier And Its Input Resistance (92.1.7) - Feedback system (Part-C)

Practice: Current Amplifier and its Input Resistance

Lesson 92.1.7Feedback system (Part-C)

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9 questions

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6 sample questions

Question 1.
What happens to input resistance in a feedback system?
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Consider the formula for input resistance in relation to feedback.
Question 2.
Define a transconductance amplifier.
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Look for the relationship between voltage and current in amplifiers.
3Question 3.
What is the desensitization factor?
- Factor increasing internal gain
- Factor increasing input resistance
- Factor affecting output power
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Think about its impact on input characteristics.
4Question 4.
True or False? The feedback configuration can decrease input resistance.
- True
- False
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Reflect on how feedback influences amplifier performance.
Question 5.
An amplifier has an initial input resistance of 150 ohms and a feedback factor β of 0.15 with a gain of 40. Calculate how feedback changes the input resistance.
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Apply the feedback formula correctly and remember unit conversions.
Question 6.
Describe what happens to output resistance in practical scenarios with non-ideal feedback conditions.
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Remember the characteristics of output resistances and how they affect the power transfer.

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