Practice Effect On Input Resistance And Voltage Gain (53.2.3) - Common Base and Common Gate Amplifiers (Contd.) : Numerical Examples (Part C)

Practice: Effect on Input Resistance and Voltage Gain

Lesson 53.2.3Common Base and Common Gate Amplifiers (Contd.) : Numerical Examples (Part C)

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9 questions

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6 sample questions

Question 1.
What is the role of the coupling capacitor in an amplifier circuit?
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Think about how AC and DC interact in circuits.
Question 2.
How does removing the coupling capacitor affect input resistance?
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Consider what happens when AC ground is removed.
3Question 3.
What happens to the input resistance when the coupling capacitor is removed?
- It decreases
- It stays the same
- It increases
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Think about the effects of AC grounding.
4Question 4.
True or False: The voltage gain increases when you remove the coupling capacitor.
- True
- False
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Consider what effects the capacitor has on signal coupling.
Question 5.
If a common base amplifier has a voltage gain of 100 with a coupling capacitor but drops to 10 without it, calculate the percentage decrease in voltage gain.
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Use the formula for percentage change to simplify your calculation.
Question 6.
Assuming an input resistance of 50 ohms with a capacitor and 500 ohms without it, explain the implications of this difference in an amplifier's performance.
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Think about how input resistance affects signal integrity.

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