Why measured value of resistor is different than coded value?
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Why measured value of resistor is different than coded value?
The actual (measured) resistance will vary from the nominal value due to subtle mechanical and chemical differences that occur during manufacturing. The manufacturer specifies the maximum deviation from the nominal value as a ±percentage. This range of deviation is called the tolerance of the resistor family.
What is more accurate color coding or ohmmeter?
So: the more accurate measurement, in this case, is the method that is a measurement (using an ohmmeter), and not the method which isn’t a measurement (reading the color codes).
Do you think resistor color coding is required when we have a multi meter to measure the resistance?
Generally on larger power resistors, the resistor colour code systems is not required as the resistance value, tolerance, and even the power (wattage) rating are printed onto the actual body of the resistor instead of using the resistor colour code system.
What is tolerance resistor?
Tolerance is the percentage of error in the resistor’s resistance, or how much more or less you can expect a resistor’s actual measured resistance to be from its stated resistance. A gold tolerance band is 5\% tolerance, silver is 10\%, and no band at all would mean a 20\% tolerance.
What does carbon resistance color code mean?
A variation on the color code is used for precision resistors which may have five colored bands. In that case the first three bands indicate the first three digits of the resistance value and the fourth band indicates the number of zeros.
How do you read the value of a resistor with color?
Decoding the nominal value of a resistor
- Decide which band is the first band.
- Look up the color of the first band in the column labeled “1st digit” and find the number associated with that color.
- Look up the color of the second band in the column labeled “2nd digit” and find the number associated with that color.
What is resistor colour code and how to read it?
What is Resistor Colour Code? Resistors are usually very tiny and it is difficult to print resistance values on them. So, colour bands are printed on them to represent the electrical resistance. These colour bands are known as resistor colour code. All leaded resistors with a power rating up to one watt are marked with colour bands.
How do you read the resistance of a colouredcolour coded resistance?
Colour coded resistance can be read from its code on the body. This is the stated resistance. Actual measured resistance can be anywhere between its maximum and minimum value as given by tolerance specified- also a part of colour code. 2.2 M resistance can thus fall between 1.8 M to 2.42 M, the extreme limits of tolerance.
What is the resistance value of the resistor given the resistor?
The third band is a multiplier band. Hence, the colour red represents a multiplier factor of 10 2. The last band represents the tolerance level and the tolerance level of the resistor is ±5\%. Hence, the resistance value of the given resistor is 2500 ± 5\% Ω or 2.5 kΩ.
What is the tolerance value of a 22 Ω resistor?
This means that the 22 Ω resistor with a tolerance value of 1.1 Ω could range from the actual value as much as 23.1 Ω to as little as 20.9 Ω. It is important to note that the band next to the tolerance band represents the multiplier.