Semiconductor Electronics

Topics in this chapter

• Semiconductor Materials and Carriers
• p-n Junction Diode Biasing
• Diode Applications and Optoelectronics
• Transistor Amplifiers and Gain
• Logic Gates and Boolean Circuits

Cheat sheet

Practice questions

1. Question 1Q-5D05B2

   At absolute zero temperature ($0\text{ K}$), a silicon crystal acts as:

   1. A.A super-conductor
   2. B.An intrinsic semiconductor
   3. C.An insulator
   4. D.A metallic conductor
   See the answer and solution
2. Question 2Q-4E38FE

   In a p-type semiconductor, the Fermi level lies:

   1. A.Exactly in the middle of the forbidden energy gap
   2. B.Close to the conduction band edge
   3. C.Close to the valence band edge
   4. D.Outside the forbidden energy gap
   See the answer and solution
3. Question 3Q-2B1C49

   The forward bias in a semiconductor diode:

   1. A.Increases the potential barrier
   2. B.Decreases the width of the depletion region
   3. C.Increases the number of minority carriers
   4. D.Increases the resistance of the depletion region
   See the answer and solution
4. Question 4Q-1D6FAF

   Which of the following logic gates is designated as a universal gate?

   1. A.AND gate
   2. B.OR gate
   3. C.NAND gate
   4. D.NOT gate
   See the answer and solution
5. Question 5Q-B317E9

   If the input frequency of a full-wave rectifier is $50\text{ Hz}$, the output ripple frequency will be:

   1. A.25 Hz
   2. B.50 Hz
   3. C.100 Hz
   4. D.200 Hz
   See the answer and solution