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By: Martin TreziseUpdated: April 05, 2021

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- Questions94,481
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- Last UpdatedMay 21, 2022

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

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?

- 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?

- Carbon Composition Resistor.
- Thermistor.
- Wire Wound Resistor.
- Metal Film Resistor.
- Carbon Film Resistor.
- Variable Resistor.
- Varistor?
- Light Dependent Resistor.

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 |

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.

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.

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.

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 |

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.

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.

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”).

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.

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**.

- To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
- To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
- To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
- To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)

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.

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**.

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 .

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**.

Long term **stability**

The