2020-12-29
ศัพท์ น่าสับสน ชุด R – Resister & resistor
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Dictionary.com
ออกเสียง resister & Resistor = ‘ri-ZIS-ter’
American Heritage® Dictionary
Resister noun
Means ‘a substance that can cover and protect a surface, as from corrosion.
Come from Verb - to resist = to offer resistance.
THE AMERICAN HERITAGE® SCIENCE DICTIONARY
Resistor noun
A device used in electrical circuits to maintain
a constant relation between current flow and voltage.
Resistors are used to step up or lower the voltage
at different points in a circuit
and to transform a current signal intoa voltage signal or vice versa,
among other uses.
The electrical behavior of a resistor obeysOhm's law
for a constant resistance;
however, some resistors are sensitive to heat, light, or other variables.
♦ Variable resistors, or rheostats,
have a resistance that may be varied across a certain range,
usually by means of a mechanical device thatalters the position
of one terminal of the resistor along a strip of resistant material.
The length of the intervening materialdetermines the resistance.
Mechanical variable resistors are also called potentiometers,
and are used in the volume knobs of audio equipment and in many other devices. Compare capacitor.
See more at Ohm's law.
Common Errors In English Usage Dictionary
Resister & resistor
A resistor is part of an electrical circuit;
a person
who resists something is a “resister."
