Why are there standard resistor values?

Why are there standard resistor values?

The standardization of resistor values serves several important purposes. When manufacturers produce resistors with different resistance values, these end up approximately equally spaced on a logarithmic scale. This helps the supplier to limit the number of different values that have to be produced or kept in stock.

Why are resistors produced with a certain number of preferred values to a particular tolerance?

The more accuracy (closer tolerance) needed in resistors chosen for a particular purpose, the more values must be in the range chosen (and generally the more expensive each resistor will be).

How are standard resistor values determined?

The basic unit of resistance is the ohm (Ω). Standard base resistor values are given in the following tables for the most commonly used tolerances (1\%, 2\%, 5\%, 10\%), along with typically available resistance ranges. To determine values other than the base, multiply the base value by 1, 10, 100, 1k, or 10k.

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What is a standard resistor?

Standard resistors are very high precision resistors used as a reference to calibrate or verify the accuracy of other resistors in industry or establishments, on lines or production equipment. these are also used to check the accuracy of resistance meters by most manufacturers.

Why do resistors values different from nominal values?

Resistors have a nominal value indicated by colored bands or other labeling. 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.

What are standard resistors?

Which type of resistors are generally produced in standard values?

Standard Resistor Symbols Carbon Composition Resistor – Made of carbon dust or graphite paste, low wattage values. Film or Cermet Resistor – Made from conductive metal oxide paste, very low wattage values.

Why do resistors have odd values?

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Originally Answered: Why do typical (commercial) resistors have weird a value? Resistors come with a percentage tolerance. Old days typically 5, 10 or 20\%. Nowadays most industrial applications use 1\% as manufacutring and designs have gotten better.

Where are standard resistors used?

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.