Practice Modes Of Operation (9.7.3) - Electronic Devices

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6 sample questions

Question 1.
What happens in the active mode of a BJT?
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Think about the junction biases.
Question 2.
Describe the cut-off mode in BJTs.
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What does an open switch do?
3Question 3.
In which mode does a BJT allow amplification?
- A) Cut-off
- B) Active
- C) Saturation
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Think about the purpose of a transistor in amplifiers.
4Question 4.
True or False: The cut-off mode of a BJT allows maximum current.
- True
- False
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What does an open switch do?
Question 5.
Design a circuit using a BJT for an audio amplifier. Explain its behavior in active mode, and include calculations for the expected current gain if the base current is 10 mA.
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Use the formula I_C = β * I_B.
Question 6.
A BJT is to be used as a switch controlling a motor. Describe its operation in saturation and cut-off modes and include the necessary voltage levels for each state.
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Consider how the transistor behaves in on and off states.

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