7.5.1. Junction-1: Base to Emitter Junction

Try these first

1. 1.

   What does it mean when we say a junction is forward-biased?

   Hint

   Think about which side is 'charged' more positively.

2. 2.

   Name the two types of carriers in a BJT.

   Hint

   One type is present in p-type material while the other is in n-type material.

3. 3.

   Which condition allows current to flow from the emitter to the base in a BJT?

   • Reverse Bias
   • Forward Bias
   • Cutoff

   Hint

   Think about how the positive charge affects current flow.

4. 4.

   True or False: Minority carriers are present in larger concentrations than majority carriers in a BJT.

   • True
   • False

   Hint

   Think about the definitions of majority vs. minority carriers.

5. 5.

   If a BJT's base-emitter voltage is increased from 0.2V to 0.7V, describe the change in current flow in the junction.

   Hint

   Recall how voltage and current are related in a diode.

6. 6.

   A BJT is operating at a temperature of 60°C and the intrinsic carrier concentration doubles. How does this impact the minority carrier concentration?

   Hint

   Think about the impact of temperature on carrier dynamics.