Yr.10. Unit 02. NPN Transistor

Transistors act like tiny "____________."

• Electron sources

• Switches

• Batteries

• Bees?

What are the names of the terminals X, Y and Z?

• X = Base, Y = Collector, Z = Emitter

• X = Emitter, Y = Base, Z = Collector

• X = Collector, Y = Base, Z = Emitter

• X = Collector, Y = Emitter, Z = Base

As well as acting like a switch, another function of the transistor is to____________signals?

• rectify

• amplify

• limit

• control

transistor has 3 electrodes namely

• PNP

• NPN

• Base/ Collector/ Emitter

• Drain/ Gate/ Source

A transistor is a …………… operated device

• Voltage

• Both Voltage and Current

• Current

• None of the Above

What family is the transistor part of?

• LED

• Diode

• Semiconductor

• Resistor

What is this?

• Vacuum Tube

• Transistor

• Circuit

• Star Wars Character

In an npn-transistor, conventional current passes

from the _______.

• base to the emitter

• emitter to the base

• collector to the emitter

• diode to the collector

Why is a housing unit soldered to the PCB and the Transistor then inserted to the housing?

• The legs are two close together

• The Transistor legs are too small to use a heat sink

• Heat from the soldering iron would damage the Transistor internals

• Transistors are very unreliable and it is easier to change them when they are fitted to a housing

What would happen if the NPN transistor was installed incorrectly in our night light circuit

• The LDR would operate the other way around

• The internal semi-conductor material would ignite

• The NPN simply would not work as it has features similar to a diode

• The battery would overheat as the resistance would be too high