9.4.3. Preparation for Future Topics

Try these first

1. 1.

   What is the primary function of biasing in a transistor?

   Hint

   Think about what conditions are needed for transistors to work effectively.

2. 2.

   In n-p-n transistors, which junction is forward biased?

   Hint

   Consider the flow of current when the transistor is activated.

3. 3.

   What is the primary requirement for a p-n-p transistor to operate in its active region?

   • Base at lower potential than collector
   • Base at higher potential than emitter
   • Emitter at higher potential than base

   Hint

   Recall the biasing conditions for p-n-p transistors.

4. 4.

   In an n-p-n transistor, which current enters the device?

   • Collector Current
   • Base Current
   • Emitter Current

   Hint

   Think about the directions of flow for the different currents in a n-p-n.

5. 5.

   You have an n-p-n transistor with the following parameters: base current of 20 µA and a current gain (β) of 150. Calculate the collector current.

   Hint

   Make sure to understand the relationship between I_C and I_B using the current gain.

6. 6.

   For a p-n-p transistor with a collector current of 2 mA and a β of 50, what would be the required base current?

   Hint

   Try reusing the formula we've discussed in class regarding current relationships.