9.3.3. Forward and Reverse Biasing Effects

Try these first

1. 1.

   What is the definition of forward bias in BJTs?

   Hint

   Think about which voltage needs to be applied to enable current flow.

2. 2.

   Define the term collector current.

   Hint

   Consider where the current is coming from.

3. 3.

   What happens in a forward biased BJT?

   • Current flows freely
   • No current flows
   • Current reverses direction

   Hint

   Think about the direction of voltage applied.

4. 4.

   True or False: Reverse saturation current (I_S) is significant during forward bias.

   • True
   • False

   Hint

   Remember, it’s a characteristic of reverse conditions.

5. 5.

   A BJT operates with a base current of 5 µA and β = 150. If the base-emitter voltage is 0.7V, calculate the collector current (I_C) and explain its significance in a circuit design application.

   Hint

   Focus on using β to calculate the output current from the input.

6. 6.

   In a circuit designed for audio amplification using a BJT, consider the effects of varying the base resistance on collector current and explain how it affects the overall gain.

   Hint

   Consider the relationship between current and resistance in a circuit.