5. Bipolar Junction Transistor (BJT)

Try these first

1. 1.

   Name the two types of BJTs.

   Hint

   Remember the direction of current flow.

2. 2.

   What terminal of the BJT is responsible for controlling current?

   Hint

   Think about where the input current comes in.

3. 3.

   What is the function of the Base terminal in a BJT?

   • To supply voltage
   • To control current flow
   • To dissipate heat

   Hint

   Think of who is in charge in the transistor!

4. 4.

   In which region does a BJT amplify signals?

   • True
   • False

   Hint

   Remember what active means in electronics!

5. 5.

   A BJT has a current gain of 150. If the base current is 5 microamps, what is the collector current?

   Hint

   Use the equation Ic = β × Ib to find the answer.

6. 6.

   Explain why BJTs might fail in terms of thermal runaway and how this might be prevented.

   Hint

   Think about how overheating affects components.