2.3.1. Forward Bias

Try these first

1. 1.

   What happens to the depletion region when a PN junction is forward biased?

   Hint

   Think about how the electric field is affected.

2. 2.

   What is the threshold voltage for silicon diodes typically?

   Hint

   Consider the materials used in the diode.

3. 3.

   What occurs when a PN junction is forward biased?

   • Depletion region widens
   • Current flows easily
   • No current flows

   Hint

   Think about the behavior of charge carriers in this situation.

4. 4.

   True or False: The threshold voltage for a silicon diode is approximately 0.3 V.

   • True
   • False

   Hint

   Consider the type of semiconductor material.

5. 5.

   Considering a silicon diode with a threshold voltage of 0.7 V, calculate the current when 1 V is applied, assuming the reverse saturation current Is is 1 mA and n = 1. The temperature is room temperature (approximately 300 K).

   Hint

   Calculate using constants and simplify.

6. 6.

   Design a simple half-wave rectifier circuit using a silicon diode and explain how forward bias behavior contributes to its function.

   Hint

   Draw the circuit and label the flow of current.