Deck 11: The Transistor Switch

Question 1

In an optoisolator, a ____ is used to trigger a phototransistor.

A) light-emitting diode
B) transistor
C) rectifier
D) rheostat

Answer 1

A

Question 2

When a transistor is driven into saturation, its frequency response is increased.

Answer 2

False

Question 3

Most motor controllers and induction heating equipment seldom operate above about 100 Hz.

Answer 3

False

Question 4

The transistor is often used as a simple switch.

Question 5

If the transistor is driven into saturation, the voltage drop between the collector and the emitter will be about ____ volts.

A) .3
B) .5
C) .7
D) .9

Question 6

____ is used to keep voltage spikes, caused by switching large currents on and off, from "talking" to the electronic control section of the circuit.

A) Isolation
B) Induction
C) Optoisolation
D) Mechanical isolation

Question 7

A transistor is used as a switch in place of a regular mechanical switch because it can ____.

A) limit power
B) filter power
C) distribute power
D) operate several thousand times a second

Question 8

An advantage of using the transistor as a switch is its ability to ____.

A) vary power
B) handle power
C) divert power
D) convert power

Question 9

A very common application for a transistor switch is the electronic ignition system of most automobiles.

Question 10

The versatility of the transistor switch permits it to be operated by a variety of sensing devices such as  devices that sense light, sound, temperature, and magnetic induction.