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15 questions
An AC generator operates on the principle of...
electromagnetic induction
reactive resistance
inductive reactance
magnetic fluctuation
The voltage induced in a conductor is ___________ ___________ to the rate which the conductor cuts the magnetic lines of force.
inversely proportional
directly proportional
negatively coorelated
absolutely opposite
In order for electromagnetic induction to occur, you need...
a conductor
a magnetic field
relative motion
all three
In an AC generator, the wire loop which is mounted so that it rotates within a magnetic field is called the....
coil
armature
slip rings
brushes
In an AC generator, the contacts are made from a soft but highly conductive material, usually carbon, and are called...
coils
armatures
slip rings
brushes
What is this?
sawtooth wave
square wave
sine wave
triangular wave
The sine wave's maximum instantaneous values, both above and below the horizontal line, are defined as...
positive peak
negative peak
peak values
peak a boo
The process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.
Variance
Alternation
Modulation
Waveform
Any continuous signal for which the time-varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal.
Analog Signal
AC
Module
Digital Signal
An electrical signal that is converted into a pattern of bits (1s and 0s). Unlike an analog signal, which is a continuous signal that contains time-varying quantities, a _____________ has a discrete value at each sampling point.
Analog Signal
Digital Signal
Smoke Signal
Optical Signal
What is this?
Digital Multimeter
Oscilloscope
Ohmeter
Galvonometer
Electrical devices consisting of two or more coils of wire used to transfer electrical energy from high voltage/low current to low voltage/high current, or visa versa, using electromagnetic induction.
Capacitor
Transformer
Transistor
Resistor
Cycles per second
Hertz
Ohms
Amps
Watts
Ultra-high-frequency (UHF) or microwave part of the radio-frequency (RF) waves used to detect the position and/or movement of objects by bouncing the radio waves off the object and measuring the interval of the echo. The name for this is an acronym for "radio detection and ranging."
SONAR
RADAR
LASER
X-Ray
Electromagnetic radiation in the range of frequencies lower than microwaves, found useful for long-range communication.
Radio Waves
Audio Waves
Light Spectrum
Infrared
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