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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define input resistance in a common emitter amplifier.
π‘ Hint: Refer to the parallel combination of resistances.
Question 2
Easy
Calculate the voltage gain if gm is 150 mA/V and RC is 2 kΞ©.
π‘ Hint: Use the formula A<sub>v</sub> = -g<sub>m</sub> Γ R<sub>C</sub>.
Practice 1 more question 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 significance of a negative voltage gain in a CE amplifier?
- It amplifies the signal positively.
- The output is inverted.
- It has no significance.
π‘ Hint: Think about the nature of CE amplifiers.
Question 2
Input resistance is critical because it affects signal coupling into the amplifier.
- True
- False
π‘ Hint: Consider how resistances work in parallel.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given that RC is 5 kΞ© and gm is 200 mA/V, calculate the voltage gain and explain how it would change if RC is halved.
π‘ Hint: Use the voltage gain formula to find changes with the modified resistors.
Question 2
A common emitter amplifier experiences power dissipation at 12 V with a collector current of 3 mA. Calculate the power loss and discuss the implications for circuit design.
π‘ Hint: Review how voltage and current interact to produce power.
Challenge and get performance evaluation