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What is a standard resistor?

By: Martin TreziseUpdated: April 05, 2021


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    May 21, 2022
Standard resistors are extremely high accuracy resistors used as reference to calibrate or check the accuracy of other resistors in industry or establishments, on the production lines or equipment. These are also used to check accuracy of resistance meters all over by most manufacturers.

Considering this, what three values are most resistors rated in?

Resistors are rated by the value of their resistance and the electrical power given in watts, (W) that they can safely dissipate based mainly upon their size.

Furthermore, why do resistors have different values?

So to overcome this, small resistors use coloured painted bands to indicate both their resistive value and their tolerance with the physical size of the resistor indicating its wattage rating. These coloured painted bands produce a system of identification generally known as a Resistors Colour Code.

What are the most common resistor values?

The most common series are:
  • E6 20%
  • E12 10%
  • E24 5% (also available with 1%)
  • E48 2%
  • E96 1%
  • E192 0.5% (also used for resistors with 0.25% and 0.1%).

What are the 4 types of resistors?

The types of resistors include:
  • Carbon Composition Resistor.
  • Thermistor.
  • Wire Wound Resistor.
  • Metal Film Resistor.
  • Carbon Film Resistor.
  • Variable Resistor.
  • Varistor?
  • Light Dependent Resistor.


What resistor do I need for LED?

Basics: Picking Resistors for LEDs
Power Supply Voltage LED Color Resistor (calculated)
5 V Red, Yellow, or Yellow-Green 128 Ω
5 V Red, Yellow, or Yellow-Green 56 Ω
9 V Red, Yellow, or Yellow-Green 72 Ω
9 V Blue, Green, White, or UV 96 Ω

What are the two main types of resistors?

There are many types of resistors and they can be divided into two groups namely fixed resistor and adjustable resistor (variable resistor). The main function of the resistor is to resist the flow of electric current and regulate the flow of electrons. This is done by the material from which they are composed.

What does a resistor do?

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. 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.

What is tolerance of a resistor?

The tolerance of a resistor is the maximum difference between its actual value and the required value and is generally expressed as a plus or minus percentage value. For example, a 1kΩ ±20% tolerance resistor may have a maximum and minimum resistive value of: Maximum Resistance Value.

What are standard capacitor values?

Standard Capacitor Values & Color Codes
These are the most commonly available capacitor values. Tolerances are highly dependent on dielectric and package type.
pF pF pF
6.2 62 620
6.8 68 680
7.5 75 750

What sizes do resistors come in?

SMD resistors come in standardized sizes; usually either 0805 (0.08" long by 0.05" wide), 0603, or 0402. They're great for mass circuit-board-production, or in designs where space is a precious commodity.

What does E mean in resistors?

470E means a value of 470 raise to the power of 1 which equals to 470 ohms. It would make more sense to have it as 470E1, but we generally tend to ignore if the value to the right of E is 1. Few other examples which will make this notation clear are: 33E0 = 33 raise to the power of 0, so 1 ohm.

What is resistor Colour code?

The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only. All 5-band resistors use a colored tolerance band. The blank (20%) “band” is only used with the “4-band” code (3 colored bands + a blank “band”).

Which material is used for standard resistor?

The alloys ,example manganin , constantanor, and nichrome are the materials used for making a standard resistor.It is reason the alloys are used for this purpose for the reason that they posses high resistivity and low temperature coefficient of resist.

How do you read resistor color codes?

Hold the resistor with these grouped bands to your left. Always read resistors from left to right. - Resistors never start with a metallic band on the left. If you have a resistor with a gold or silver band on one end, you have a 5% or 10% tolerance resistor.

How do I calculate resistance?

Ohms Law and Power
  1. To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
  2. To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
  3. To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
  4. To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)

How many resistors are there?

Generally, there are two types of resistors which have linear properties. As its name suggests, a fixed resistor is a resistor which has a specific value and we can't change their value.

Is a light bulb a resistor?

A resistor is anything that electricity can not travel through easily. The reason a light bulb glows is that electricity is forced through tungsten, which is a resistor. The energy is released as light and heat. A conductor is the opposite of a resistor.

What are the characteristics of a standard resistance?

The two important characteristics of manganin alloy that is useful in making standard resistance coils are: Manganin has a constant electrical resistance over a wide range of temperature that is a small value of temperature coefficients α and β .

What is 1k resistor?

In this lesson, we work this out for a 1k Ω resistor where ''k'' is the abbreviation for the prefix ''kilo'', meaning 1,000. So, a 1k Ω resistor has a value of 1,000 ohms and the number we will code is 1,000. There are three steps for coding a 1kΩ resistor.

What is stability in resistor values?

Long term stability
The stability indicates the maximum tolerable change of the resistance value. The resistance value changes on the long term due to mechanical, electrical and thermal loads. In standards several stability classes are determined. The standards define tests to define the stability classes.