Falstad Simulation: Transistors

Breadboard the circuit to complete the section below.


  1. What happens when the 10k resistor is removed from the base (B)?
  2. Why does the base (B) have a 10k resistor, but the emitter (E) and collector (C) have a 220R resistors?
  3. What is the difference between the NPN and PNP transistors?