DELMAR UNIT 5 RESISTORS
Resistors are the primary type of electric ______. - correct answer ✔loads
Which two functions do resistors perform in a circuit? - correct answer ✔1.
Limit the flow of current through the circuit
2. To produce a voltage divider
A short circuit occurs when resistance is ___ and current is ____. - correct
answer ✔Resistance low, current high
Voltage divider circuits are used today in: - correct answer ✔-applications
involving field-effect transistors (FETS) and in multirange voltmeter circuits
Define Fixed Resistor: - correct answer ✔Fixed resistors have only one
ohmic value, which cannot be changed or adjusted
One of the most common fixed resistors is the - correct answer ✔Carbon
Resistor
Carbon resistors are made from a compound of: - correct answer ✔carbon
graphite and a resin bonding material, encased in non-conductive material
with connecting leads (the proportion of carbon and resin determine the value
of resistance).
Carbon resistors are popular because: - correct answer ✔- they are
inexpensive
-readily available
, Carbon resisters are made in standard values that range from about: - correct
answer ✔1 ohm to about 22 megohms.
Carbon resistors can be obtained in power ratings of about: - correct answer
✔1/8, 1/4, 1/2, 1 and 2 watts.
The power rating of a resistor is indicated by its ________. - correct answer
✔size (must have larger surface area to dissipate more heat)
What is the one undesirable characteristic of carbon resistors? - correct
answer ✔They change their value with age or if they are overheated. They
will generally increase instead of decrease in value.
Name 5 types of fixed resistors: - correct answer ✔1. Carbon 2. Metal Film 3.
Carbon Film 4. Metal Glaze 5. Wire-Wound
Metal film resistors are constructed by applying a ______ film to a ____ rod in
a vacuum. - correct answer ✔film of metal to a ceramic rod in a vacuum.
The resistance of metal film resistors is determined by: - correct answer ✔-
type of metal used to form film
-thickness of film
In which ways are metal film resistors superior to carbon resistors? - correct
answer ✔1. do not change their value with age 2. their tolerance is generally
better than that of a carbon resistor
What is the tolerance range of a carbon resistor? - correct answer ✔20%,
10% or 5%
Resistors are the primary type of electric ______. - correct answer ✔loads
Which two functions do resistors perform in a circuit? - correct answer ✔1.
Limit the flow of current through the circuit
2. To produce a voltage divider
A short circuit occurs when resistance is ___ and current is ____. - correct
answer ✔Resistance low, current high
Voltage divider circuits are used today in: - correct answer ✔-applications
involving field-effect transistors (FETS) and in multirange voltmeter circuits
Define Fixed Resistor: - correct answer ✔Fixed resistors have only one
ohmic value, which cannot be changed or adjusted
One of the most common fixed resistors is the - correct answer ✔Carbon
Resistor
Carbon resistors are made from a compound of: - correct answer ✔carbon
graphite and a resin bonding material, encased in non-conductive material
with connecting leads (the proportion of carbon and resin determine the value
of resistance).
Carbon resistors are popular because: - correct answer ✔- they are
inexpensive
-readily available
, Carbon resisters are made in standard values that range from about: - correct
answer ✔1 ohm to about 22 megohms.
Carbon resistors can be obtained in power ratings of about: - correct answer
✔1/8, 1/4, 1/2, 1 and 2 watts.
The power rating of a resistor is indicated by its ________. - correct answer
✔size (must have larger surface area to dissipate more heat)
What is the one undesirable characteristic of carbon resistors? - correct
answer ✔They change their value with age or if they are overheated. They
will generally increase instead of decrease in value.
Name 5 types of fixed resistors: - correct answer ✔1. Carbon 2. Metal Film 3.
Carbon Film 4. Metal Glaze 5. Wire-Wound
Metal film resistors are constructed by applying a ______ film to a ____ rod in
a vacuum. - correct answer ✔film of metal to a ceramic rod in a vacuum.
The resistance of metal film resistors is determined by: - correct answer ✔-
type of metal used to form film
-thickness of film
In which ways are metal film resistors superior to carbon resistors? - correct
answer ✔1. do not change their value with age 2. their tolerance is generally
better than that of a carbon resistor
What is the tolerance range of a carbon resistor? - correct answer ✔20%,
10% or 5%
