5.1. Introduction

Try these first

1. 1.

   What does BJT stand for?

   Hint

   Remember the first letters of each word.

2. 2.

   Name the three terminals of a BJT.

   Hint

   Think about what parts make up the transistor.

3. 3.

   What is the key function of a BJT?

   • Voltage control
   • Signal amplification
   • Current limiting

   Hint

   Think about what you want to achieve with a transistor in most applications.

4. 4.

   True or False: The emitter of a BJT is responsible for collecting charge carriers.

   • True
   • False

   Hint

   Remember the roles of each terminal.

5. 5.

   Design an amplifier circuit using an NPN transistor and explain how you would adjust the gain.

   Hint

   Consider how the resistor values influence the base current.

6. 6.

   Explain how to select the appropriate BJT for use in a power supply circuit that needs to handle a current of 1 ampere.

   Hint

   Look into data sheets to find specifications.