Practice Formation Of Depletion Region (2.2) - PN Junction Diode and Applications

Practice: Formation of Depletion Region

Lesson 2.2PN Junction Diode and Applications

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9 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What happens to electrons when p-type and n-type materials are joined?
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Think about where each type of carrier is located.
Question 2.
Define the term 'depletion region'.
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Focus on what happens to charge carriers.
3Question 3.
What forms the depletion region?
- A: Movement of electrons only
- B: Recombination of charge carriers
- C: Application of external voltage
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Think about what happens when charge carriers meet.
4Question 4.
True or False: The depletion region widens when a PN junction is forward-biased.
- True
- False
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Consider what happens when voltage is applied.
Question 5.
Consider a PN junction diode with a built-in potential of 0.7 V. Calculate the necessary external voltage to forward bias this diode and allow current to flow.
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Consider the needed voltage versus what is already present.
Question 6.
Explain how changes in temperature affect the width of the depletion region in a PN junction.
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Think about how thermal energy influences carrier mobility.

5 more questions in this section. Enroll free to practise them all.