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Cards (22)
What is the purpose of the
resistor
color
code
?
It is used to indicate the
nominal value
and tolerance of
resistors.
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How is the power rating of a resistor determined?
The power rating is not indicated in the color code and must be determined by
experience
using the
physical size
of the resistor.
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How many color bands are used for resistors with ±5% or ±10% tolerance?
Four
color bands are used.
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How many color bands are used for resistors with ±1% or ±2% tolerance?
Five
color bands are used.
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What does the color code for a 4-band resistor represent?
1st
Band: 1st Significant Digit
2nd
Band: 2nd Significant Digit
3rd Band:
Multiplier
4th Band:
Tolerance
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How do you determine the nominal resistance value from a 4-band resistor?
You use the first two bands for significant digits, the third band as a
multiplier
, and the fourth band for
tolerance.
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What is the nominal value and tolerance for a resistor with color bands Brown, Black, Red, and Gold?
The nominal value is
1
,
000
Ω
1,000 \, \Omega
1
,
000
Ω
with a tolerance of
±5
%.
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What is the typical way to express resistance values for resistors?
Resistance values are typically expressed in
kΩ
if the resistance is
≥ 1,000
Ω, and in MΩ if the resistance is ≥ 1,000,000 Ω.
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What is the conversion table used for in resistor values?
Converts
resistance
values from Ω to
kΩ
or MΩ
Helps in understanding the
scale
of resistance
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How do you calculate the nominal resistance value for a resistor with a nominal value of
10
×
1
0
2
Ω
10 \times 10^2 \, \Omega
10
×
1
0
2
Ω
?
The nominal resistance value is
1
,
000
Ω
1,000 \, \Omega
1
,
000
Ω
.
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What is the nominal resistance and tolerance for a resistor with color bands Yellow, Violet, Orange, and Gold?
The nominal resistance is
47
,
000
Ω
47,000 \, \Omega
47
,
000
Ω
with a tolerance of
±5
%.
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How do you determine the nominal resistance value for a resistor with color bands Orange, Orange, Green, and Silver?
The nominal resistance value is
3
,
500
,
000
Ω
3,500,000 \, \Omega
3
,
500
,
000
Ω
with a
tolerance
of
±10
%.
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How do you read the color code on a resistor?
For
4-band
resistors, the
last
band (gold or silver) indicates tolerance.
For
5-band
resistors, the first band is the one closest to the
lead.
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What color band indicates a tolerance of ±10%?
Silver.
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What color band indicates a tolerance of ±5%?
Gold.
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What is the significance of the first band in a 5-band resistor?
The
first
band indicates the
first significant digit
of the resistance value.
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How do you specify the color code for a resistor with a nominal value of
2.5
M
Ω
2.5M \, \Omega
2.5
M
Ω
and a tolerance of ±1%?
The color code would be
Green
, Black, Red,
Yellow
, and Brown.
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What is the nominal resistance and tolerance for a resistor with color bands Brown, Green, Red, and Gold?
The nominal resistance is
1
,
500
Ω
1,500 \, \Omega
1
,
500
Ω
with a tolerance of
±5%.
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What are the steps to determine the color code for a resistor?
Identify the number of
bands
(
4
or 5).
Use the
color code table
to find significant digits and multiplier.
Determine
tolerance
from the
last
band.
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What is the nominal resistance value for a resistor with color bands Red, Green, Blue, and Silver?
The nominal resistance is
2
,
500
,
000
Ω
2,500,000 \, \Omega
2
,
500
,
000
Ω
with a tolerance of ±10%.
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What is the nominal resistance value for a resistor with color bands Black, Brown, Red, and Gold?
The nominal resistance is
1
,
000
Ω
1,000 \, \Omega
1
,
000
Ω
with a
tolerance
of
±5
%.
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What is the final takeaway about working with the resistor color code?
Understanding
the color code is essential for
identifying
resistor values.
It
simplifies
the process of working with
electronic components.
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