Practice Practical Circuit Behaviour (23.5.3) - Linear models of Amplifiers (Part B)

Practice: Practical Circuit Behaviour

Lesson 23.5.3Linear models of Amplifiers (Part B)

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9 questions

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6 sample questions

Question 1.
What is a current amplifier?
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Think about the purpose of the amplifier.
Question 2.
What does the unloaded current gain indicate?
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Focus on the term 'unloaded'.
3Question 3.
What does a current amplifier do?
- A. Amplifies voltage
- B. Amplifies current
- C. Attenuates signal
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Recall the definition of a current amplifier.
4Question 4.
The unloaded current gain is defined as:
- True
- False
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Think about what 'unloaded' means.
Question 5.
Design a simple current amplifier model that can react to an input current of 3 mA with an expected unloaded gain of 5. What would be the unloaded output current? Now, what if a load of 10 ohms is connected?
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Calculate the output using the gain and consider the effect of adding the load.
Question 6.
Explain how a change in temperature could affect the operation of a current amplifier configured using BJTs. What practical measures can be taken to mitigate these effects?
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Think about how external conditions influence electronic components.

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