elect. 5 of 5 study guide
A resistor has color bands of red, violet, brown, and gold. What is the resistance and tolerance of the resistor?
270 ohms, 5%
24 ohms is a standard value for ten percent tolerance resistors.
False
A _____ resistor is made by winding a piece of resistive wire around a ceramic core.
wire-wound
A resistor has color bands of brown, black, red, and silver. What is the resistance and tolerance of the resistor?
1000 ohms, 10%
The word potentiometer comes from the word production.
False
A _____ resistor is made by applying a film of carbon to a ceramic rod.
carbon film
A _____ resistor is made from a compound of carbon graphite and resin bonding material.
composition carbon
Resistors that only have one ohmic value are called _____ resistors.
fixed
Wire-wound resistors are often used because they are able to operate at _____ power levels than other resistors.
higher
A _____ resistor is made by applying a film of metal to a ceramic rod in a vacuum.
metal film
A _____ resistor is made by combining metal with glass and then applying it to a ceramic base as a thick film.
metal glaze
A _____ resistor operates by moving the wiper arm with a screw of some number of turns.
multiturn variable
A variable resistor is also called a _____.
potentiometer
A variable resistor with three terminals is called a _____.
potentiometer
A variable resistor with two terminals is called a _____.
rheostat
In a(n) _____ circuit, there is very little resistance and a large amount of current flows.
short
The value of a resistor can often be determined by the "color code."
True
_____ were used in vacuum-tube circuits many years ago and are still used today in applications involving field-effect transistors (FETs) and multirange voltmeter circuits.
Voltage dividers
The _____ of a resistor indicates the plus and minus limits of a resistor's ohmic value.
tolerance
What does the fourth band of color on a resistor indicate?
tolerance
A resistor whose values can be varied over a range of values is called a _____ resistor.
variable