Why Standard Resistor Values Used

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. These standard resistor values have a logarithmic sequence related to the component accuracy enabling the standard resistor values to be spaced according t.

Standard Resistor Values Resistor Guide

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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.

Why standard resistor values used. Resistor is an electronic component. A standard resistor is a resistor which is precise enough in value and stable enough in temperature coefficient to be used as a calibration standard. Resistor is used in every electronic and integrated circuit.

It is a passive element means it consume power. Power ratings of resistors are not defined in a norm therefore often is deviated from the above described series. In electronic circuit its resistance is used to limit current or for better understanding it limits flow of electron.

The standard resistor values are organised into a set of series of values known as the e series. Standard resistor values are calculated using the simple formula given below. The gain here is a r f rin.

I know that you could have infinite number of combinations for these resistors but why would some one use specific value. The values given to resistors fall into a number of preferred or standard resistor values. In electronic circuits resistors are used to reduce current flow adjust signal levels to divide voltages bias active elements and terminate transmission lines among other uses.

Used in metrology labs to calibrate ohmmeters resistance bridges etc. Round the results to the proper number of significant figures three for 1 and 2 two for 5 and 10. Which resistor value would you choose and why.

A resistor is a passive two terminal electrical component that implements electrical resistance as a circuit element. 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. Resistor colour coding uses coloured bands to easily identify a resistors resistive value and its percentage tolerance.

However lets say i want a gain of 10 vv. There are many different types of resistor available which can be used in both electrical and electronic circuits to control the flow of current or to produce a voltage drop in many different ways. An example is standard sizes for resistors or the marking of resistors with color codes or numerical codes.

Aside from the preferred values many other standards related to resistors exist. Ie r f 100mohm r in 10mohm gives a gain of 10vv but also r f 10 ohm and r in 1 ohm gives the gain of 10vv. By using standard values resistors of different manufacturers are compatible for the same design which is favorable for the electrical engineer.