310102a Resistors 2025 (TF)

Resistance

The opposition to current (electron flow), causing collisions between electrons and atoms which produce heat.

Ohm (Ω)

The unit of measurement for resistance.

Load

The resistance in a circuit, which can have more than one load.

Fixed Resistors

Resistors made to have specific resistance values, typically created from materials like carbon and resin.

Color Codes

A system used to determine the resistive value of a resistor, based on color bands.

Wire Wound Resistors

Resistors made by winding a wire around a ceramic core, capable of tolerating high temperatures.

Variable Resistors

Resistors that allow for a change in resistance value by sliding an electrical contact along the resistor.

Rheostat

A type of variable resistor with a slider or wiper contact, typically having two terminals.

Potentiometer

A three-terminal variable resistor with a sliding contact that forms an adjustable voltage divider.

Tolerance

The permissible variation in resistance, usually expressed as a percentage.

4-Band Color Code

A color code used to determine the resistance and tolerance of a resistor using four color bands.

Mnemonic Devices

Memory aids used to help remember information, such as the resistor color code.

Resistive Material

Materials like carbon, metal-alloy, or metal oxide used in the construction of resistors.

Multiplier

The third digit in a color-coded resistor that indicates the power of ten that the first two digits are multiplied by.

Ceramic Core

A cylindrical structure made of ceramic material, often used in wire wound or variable resistors.