Back to the Beginning!
Hot Power Ratings
Diodes, Diodes, Diodes!
AC/DC
Zeners and Transistors
100
Solid-state electronic devices are constructed from solid pieces of material called this.
Semiconductors
100
Electrical and electronic components have a power rating that is measured in this.
Watts
100
A diode is polarity sensitive! If the positive of the power supply must be connected to the ______, and the negative must be connected to the ________.
Anode and Cathode
100
This device converts alternating current into direct current.
Rectifier
100
What are the three leads of a bipolar junction transistor?
Collector, Emitter, and Base
200
These operate by moving a wiper arm to change its impedance value.
Multiturn variable resistors.
200
This axis on an oscilloscope reading represents voltage.
Y-axis
200
A silicon rectifier diode has this forward voltage drop.
.7V
200
This is the term to describe the pulsations created when voltage turns on and off at regular intervals creating the positive half of the AC sine wave, but never changes polarity.
Ripple
200
In what direction does a Zener diode conduct in NORMAL operation?
Reverse Bias
300
These two types of materials are joined together to create semiconductors.
P-type and N-type
300
Yay or nay. The purpose of a heat sink is to increase the surface area of the device connected to it.
Yay
300
If the reverse voltage rating of a diode is 50V, and you wire it in reverse voltage to 55V, will you blow it up?
Possibly.
300
This device is used to filter voltage.
Capacitor
300
The primary function of a Zener diode is to regulate this in an electronic circuit.
Voltage
400
This is the process to add impurities, or elements with a different number of valence electrons, to an intrinsic semiconductor.
Doping
400
We use this when mounting a heat sink to ensure good thermal contact between the device and the heat sink.
Thermal Compound
400
LEDs are rated to function at this amperage.
20mA
400
The average DC voltage for a single-phase full-wave rectifier is what percentage of the RMS value?
90%
400
A transistor that is driven into saturation will drop how much voltage across the collector-emitter?
.2-.3V
500
A variable resistor used to provide a variable voltage is known by what term?
Potentiometer
500
On an oscilloscope, if the scale of the Y-axis is 10V per division, and the sine wave peaks at 2.6 divisions, what is the voltage?
26V
500
Draw the electrical symbol for a LED.
500
This is an alternative term for an inductor that is used to filter current in a rectifier circuit.
Choke
500
If the collector-emitter current is 40mA, and the transistor has a Beta of 1000, what does the base current need to be?
40 microAmps