7.7.1. Observing Junction Interactions

Try these first

1. 1.

   What are the two primary junctions in a BJT?

   Hint

   Think about their names; one is for the emitter and the other for the collector.

2. 2.

   What happens during forward bias?

   Hint

   Recall the effect of applying a positive voltage.

3. 3.

   What are the two junctions of a BJT?

   • Base-emitter and base-collector
   • Collector-emitter and base-collector
   • Base-base and collector-collector

   Hint

   Focus on the emitter and collector connections.

4. 4.

   In a BJT, which junction is typically forward biased during normal operation?

   • True
   • False

   Hint

   Think about how BJTs are used in amplifiers.

5. 5.

   A BJT operates with a base-emitter voltage of 0.7V while the base-collector is reverse biased. Calculate the expected base and collector currents given the forward currents are known.

   Hint

   Use I_C = Beta * I_B, where Beta is the current gain.

6. 6.

   If a BJT shows a collector current of 2 mA with a base current of 20 µA, determine the beta and provide its significance.

   Hint

   Beta shows how much the base current is amplified to the collector current.