NPN & PNP Transistors explained - electronics engineering

The video tutorial explains the basics of transistors, focusing on PNP and NPN types. It covers the pin configuration, the process of doping silicon to create P and N type materials, and the formation of PN junctions. The tutorial demonstrates how NPN and PNP transistors function in circuits, detailing the flow of current and the role of the emitter, base, and collector pins. It concludes with an explanation of transistor symbols used in electrical drawings.

What are the three pins on a transistor typically labeled as?

• Emitter, Base, Collector

• Emitter, Base, Capacitor

• Emitter, Battery, Collector

• Emitter, Battery, Capacitor

What is the purpose of doping silicon in transistors?

• To make it waterproof

• To alter its electrical properties

• To change its color

• To increase its size

In an NPN transistor, how are the layers of materials arranged?

• Two layers of P-type and one layer of N-type

• Two layers of N-type and one layer of P-type

• Three layers of P-type

• Three layers of N-type

How does the current flow in an NPN transistor when the switch is pressed?

• 5 milliamps into the base, 25 milliamps into the collector, 20 milliamps out of the emitter

• 20 milliamps into the base, 5 milliamps into the collector, 25 milliamps out of the emitter

• 25 milliamps into the base, 20 milliamps into the collector, 5 milliamps out of the emitter

• 5 milliamps into the base, 20 milliamps into the collector, 25 milliamps out of the emitter

What does the arrow on a transistor symbol indicate?

• The voltage level

• The type of transistor

• The direction of conventional current

• The direction of electron flow