Practice 78xx Series (4.1) - Semiconductor Devices and Applications

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8 questions

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6 sample questions

Question 1.
What is the output voltage of the 7805?
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Think of the number indicated in the model.
Question 2.
What kind of devices often use 78XX series regulators?
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Consider which devices need stable power.
3Question 3.
What output voltage does the 7805 provide?
- 12V
- 9V
- 5V
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Think of the model number.
4Question 4.
True or False: The 7812 outputs 5 volts.
- True
- False
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Recall the output specifications.
Question 5.
Design a simple power supply circuit using both a 7805 and a 7812 to power a microcontroller and a sensor. Explain how the output can be stabilized.
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Consider how each part of your circuit requires different voltage levels.
Question 6.
If a load connected to the 7805 requires 500 mA and the input voltage is 12V, calculate the power dissipation in the regulator and discuss heat management strategies.
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Think about how heat is generated and how it can be dissipated.

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