Physical Science 1120
"hole"
A _______________ which conducts a current as it moves toward the cathode is created by doping germanium with an element with three valence electrons.
three
A transistor contains ______________ regions of semiconductor material.
CRT
Cathode Ray Tube
red, green, blue
Color CRT tubes emit _____________, ______________, and ____________ light.
electronic device containing two electrodes
Diode
free electron
Doping germanium with an element with five valence electrons creates a _____________ with conducts current as it moves throughout the crystal.
FET
Field Effect Transistor
deflection yoke
In a picture tube or camera, the _____________ performs the scanning operation.
junction
Input current controls output current in a _______________ transistor.
Integrated circuits are less expensive or smaller than solid-state components
List on advantage of integrated circuits over solid-state components.
do not burn out, less expensibe
List one advantage of transistors over vacuum tubes _________________.
amber, green
Monochromatic CRT's emit _____________ or ___________ light.
Fusion
Nuclear ______________ is not an efficient source of energy for electric generation plants because it requires intense heat and pressure.
Fission
Nuclear _______________ is an efficient source of energy for electric generation plants.
ultrasonic
One problem with finding a way to transmit the human voice over radio waves was that the sound was ____________ when the receiver diaphragm vibrated at radio frequencies.
moderator
The _____________ is a substance that slows neutrons.
core
The _______________ of a nuclear power plant contains the uranium fuel.
control rods
The ________________ regulate the rate of the fission reaction.
modulated
These problems were salved by using __________ waves.
field-effect
Voltage applied to the gate of a _________________ transistor controls current.
process of adding arsenic to germanium so that it becomes a semiconductor
doping
process that increases concentration of U-235
enrichment
FM
frequency modulation
device in which electric current causes gas to emit light
gas-discharge tube
time required for one-half the mass of any element to decay into simpler atoms
half-life
IC
integrated circuit
a different form of an element with same atomic number but different atomic mass number
isotope
passivation layer
layer of insulating material
epitaxial layer
layer of n-type semiconductor
reaction in which a nucleus of heavy mass is split into two nuclei of smaller mass
nuclear fission
reaction in which two lightweight, stable nuclei are combined into one more massive nucleus
nuclear fusion reaction
device that allows nuclear fission to proceed at a controlled rate
nuclear reactor
mask
plate on which drawings are duplicated
process by which radioactive elements are transformed into more stable atoms
radioactive decay
device that converts AC to DC
rectifier
process in which an electron beam is moved back and forth across a screen
scanning
substrate
silicon water of p-type semiconductor material
window
spot that has been etched by an acid
Transistor
transfer resistor
transformation of one element into a different element
transmutation
electronic device containing three electrodes
triode
beta particle
-1B^0
energy
Another problem was that when their frequency was reduced to audible range, radio waves did not contain enough _____________ to be transmitted through the air.
beta
B
white
Black-and-white CRT's emit _______________ light.
water
__________________ is the most commonly used moderator in nuclear reactors.
Thermionic
____________________ emission is the emission of electrons from a hot, glowing object.
process of emitting 2He^4
alpha decay
AM
amplitude modulation
process of emitting -1B^o
baeta decay
composed mostly of hydrogen nuclei
cosmic particle