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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for calculating small-signal emitter resistance (r_e′) in a BJT?
💡 Hint: Think about Ohm's law and the relationship between voltage and current.
Question 2
Easy
How do you calculate the voltage gain (A_v) for a common-emitter amplifier?
💡 Hint: Focus on the resistances involved!
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 does A_v represent in a BJT amplifier?
- Current gain
- Voltage gain
- Power gain
💡 Hint: Think about how amplifiers affect voltage levels.
Question 2
True or False: Input resistance (R_in) affects how much of a signal is received by the amplifier.
- True
- False
💡 Hint: Recall the impact of impedances in circuits.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You are designing an amplifier with the following parameters: R_C = 1 kOhm, R_L = 500 Ohm, I_E = 1.75 mA. Calculate A_v and explain the effect of changing R_C on A_v.
💡 Hint: Focus on understanding the impact of changing resistances in the circuit set-up.
Question 2
You measure an input resistance R_in of 15 kOhm and want to connect it to a 10 kOhm source. Calculate the loading effect and discuss implications on signal levels.
💡 Hint: Use the formula for resistances in parallel to calculate the total input resistance and evaluate how this affects performance.
Challenge and get performance evaluation