Trivia

Hard

Electronic Resistors Are Commonly Distinguished With What Markings?

Raised Dots
Colored Bands
Serial Numbers
Unique Wire Leads
Three electrical resistors showing different colors of identification bands.
Afrank99/Wikimedia

Answer: Colored Bands

If you’ve ever peered closely at the resistors found on the interior parts of many of your household electronics, you may have noticed their tiny stripes. Those color bands, known formally as the Electronic Color Code, serve to indicate the resistor’s resistance value.

The system was developed in the 1920s by the Radio Manufacturers Association (an organization now known as the Electronic Industries Alliance) to help easily distinguish the values between otherwise often indistinguishable resistors. The color and order of the bands on a standard four-band resistor serve to indicate significant figures of the resistor’s value (the first two bands), as well as the decimal multiplier (the third band), and the tolerance of the resistor (the fourth band). To a layman, the band system seems quite arcane, but to a well-versed professional or serious hobbyist, the band system is second nature.

While this system of color-coded bands has prevailed for the better part of a century now (and will likely continue to do so for non-surface-mount resistors), the advent of tiny surface-mount resistors—often hardly bigger than a grain of rice—has led to an increase in alpha-numeric coding in place of the banding method.

Trivia

Hard

What Are The Most Influential Sci-Fi Writers Of The 20th Century Called?

Trivia

Very Hard

Which Video Game Series’ Protagonist Derives His Name From Iconic Sci-Fi Writers?

Trivia

Hard

In 1981 It Would Take You Two Hours To Download What?

Trivia

Hard

The Loudest Sirens Ever Built Were Powered By?

Trivia

Hard

The “Screen-Door Effect” Is a Problem Engineers Need to Overcome In What Product?

Trivia

Hard

What Purpose Does The Penny Aboard NASA’s Curiosity Rover Serve?

Trivia

Hard

In Computer Programming Slang, A Software Bug That Changes When You Attempt To Observe It Is A?

Trivia

Easy

What Is Believed To Be At The Center Of Nearly Every Galaxy?

Trivia

Hard

Alcohol Is An Antidote To Poisoning By What?

Trivia

Hard

Nevermind, A Psychological Horror Video Game, Uses What Technique To Increase Game Difficulty?