✔ Value Of Resistors

Value Of Resistors

- July 31, 2019

There are two main types of resistors. If two resistors or impedances in series are unequal and of different values then the total or equivalent resistance r t is equal to the mathematical sum of the two resistances.

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The value of a resistor is given in ohms and is often referred to as its resistance.

Value of resistors. Resistor values e6 series tolerance 20 the e6 series has six values in each decade. Standard resistors have four color bands. E48 series tolerance 2 each decade is divided in 48 values.

4 band resistor color code calculator and chart digikey electronics. The bigger the value of a resistor the more it opposes the current flow. That is equal to r 1 r 2.

E12 series tolerance 10 the e12 series is probably the most common series. More online conversion calculators at digi key. Standard resistor values 5 10 10 100 10k 10k 100k 10m 11 11 110 11k 11k 110k 11m 12 12 120 12k 12k 120k 12m 13 13 130 13k 13k 130k 13m.

Take as an example a resistor that has a value of 1 ohm and a tolerance of 20. The tolerance is 20. The standard resistor values are organised into a set of series of values known as the e series.

Four of the. E24 series tolerance 5 and 1. The resistor color code calculator decodes and identifies a value and tolerance of 4 band wire wound resistors.

As the chart at the right shows created in excel plotting the values on a logarithmic scale results in a straight line due to the exponential in the equation. The different values are spaced such that the top of the tolerance band of one value and the bottom of the tolerance band of the next one do not overlap. Resistors are available in a range of different resistance values from fractions of an ohm w to millions of ohms.

Round the results to the proper number of significant figures three for 1 and 2 two for 5 and 10. Three of the bands tell you the nominal value which means the value the resistor was designed to have. Standard resistor values are calculated using the simple formula given below.

Precision resistors which have more precise values than standard resistors have five color bands. A resistor is a device that opposes the flow of electrical current.