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Q1. What is the function of a diode in a circuit? (2020)
Solution:
A diode allows current to flow in one direction only, acting as a one-way valve for electric current.
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Q2. What is the role of a doping element in a semiconductor? (2020)
Solution:
Doping elements are added to semiconductors to change their conductivity by introducing additional charge carriers.
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Q3. What is the primary function of a diode? (2022)
Solution:
A diode primarily functions to rectify current, allowing it to flow in one direction only.
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Q4. What happens to the resistance of a semiconductor with an increase in temperature? (2023)
Solution:
The resistance of a semiconductor decreases with an increase in temperature due to the increased number of charge carriers.
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Q5. Which of the following is a property of intrinsic semiconductors? (2023)
Solution:
Intrinsic semiconductors are in their pure form without any doping.
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Q6. What is the effect of temperature on the conductivity of intrinsic semiconductors? (2021)
Solution:
As temperature increases, more electrons gain enough energy to jump the band gap, increasing conductivity.
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Q7. What is the typical forward voltage drop across a silicon diode? (2023)
Solution:
The typical forward voltage drop across a silicon diode is approximately 0.7 V.
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Q8. Which of the following is a common application of semiconductors? (2019)
Solution:
Transistors are a common application of semiconductors, used in various electronic devices.
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Q9. What type of semiconductor is formed when silicon is doped with arsenic? (2023)
Solution:
Doping silicon with arsenic, a pentavalent element, creates an n-type semiconductor due to the addition of extra electrons.
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Q10. In a Zener diode, what is the purpose of the reverse breakdown region? (2020)
Solution:
The reverse breakdown region in a Zener diode allows it to regulate voltage by maintaining a constant output voltage.
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