Definition

A type of electronic component that changes its resistance based on the voltage applied to it, often used to protect electrical circuits from sudden increases in power.

Example

The technician installed a varistor to safeguard the circuit from voltage spikes.

Conversation

Have you ever heard of a varistor?

Yeah, I think it's used to protect circuits from power surges, right?

Exactly! I read that it changes resistance based on voltage.

That's pretty cool; I didn't know that about it!

Synonyms & Antonyms

Root Explanation

Varistor is formed from "var" (derived from 'variable', meaning changeable) and "resistor" (from Latin 'resistere', meaning to stand against). The word describes a device that changes its resistance with voltage, thus standing against variable electrical conditions.

Memory Tip

Think of a device that can change its resistance ('var') to adapt to different electrical conditions, just like how a varistor works.

Visually Confused Words