Practice Summary Of Changes (27.8) - Common Emitter Amplifier (contd.) (Part B)

Practice: Summary of Changes

Lesson 27.8Common Emitter Amplifier (contd.) (Part B)

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8 questions

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6 sample questions

Question 1.
What does the negative sign in voltage gain signify?
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Think about the signal direction.
Question 2.
What is the purpose of the emitter resistor R_E?
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Consider stability and variations in β.
3Question 3.
What is the primary task of the emitter resistor R_E in a Common Emitter Amplifier?
- Increase gain
- Stabilize operating point
- Reduce output
- Increase input resistance
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Think about what happens to the circuit without R_E.
4Question 4.
True or False: The output voltage of a Common Emitter Amplifier is in phase with the input.
- True
- False
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Consider the behavior of an inverting amplifier.
Question 5.
Given a Common Emitter Amplifier with R_C = 10kΩ, g_m = 0.02 S, and R_E = 1kΩ, calculate the voltage gain. Discuss if the gain would be acceptable if R_E were increased.
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Use the gain formula and substitute values for full calculations.
Question 6.
Analyze the input resistance for a Common Emitter Amplifier with R_BB = 100kΩ, β = 50, r = 150Ω, and R_E = 200Ω. What would happen if R_E were removed?
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Focus on parallel resistance calculation including the base resistance.

4 more questions in this section. Enroll free to practise them all.