9.1. Introduction to Transistors

Try these first

1. 1.

   What are the three regions of a transistor?

   Hint

   Think about the order in n-p-n and p-n-p.

2. 2.

   What is the primary function of a transistor?

   Hint

   Remember, it's often used in circuits.

3. 3.

   What is the primary function of a transistor?

   • Amplify signals
   • Isolate signals
   • Diminish signals

   Hint

   Think about where transistors are typically used.

4. 4.

   True or False: In n-p-n transistors, the collector current flows into the collector terminal.

   • True
   • False

   Hint

   Envisage the direction of current flow.

5. 5.

   If a p-n-p transistor has a base-emitter voltage of 0.7V and the base-collector voltage of 5V, is it in active mode? Explain your reasoning.

   Hint

   Check the bias condition for both junctions.

6. 6.

   Draw the I-V characteristic curve for an n-p-n transistor under various operating conditions and describe how the curve changes as the voltage increases.

   Hint

   Consider how the current reacts to changes in voltage at each region.