Definition

A device used to measure the electrical potential difference between two points in a circuit, expressed in volts.

Example

The technician used a voltmeter to check the voltage in the electrical system.

Conversation

Have you ever used a voltmeter for your science projects?

Yeah, I used one last week to measure the battery voltage.

That's cool! I need to borrow your voltmeter for mine next time.

Sure, just let me know when you need it!

Synonyms & Antonyms

Root Explanation

Voltmeter → It is formed from "volt" (named after the Italian physicist Alessandro Volta, who is known for his work in electricity) and "-meter" (from Greek "metron", meaning measure). The word "voltmeter" refers to an instrument that measures electric potential difference in volts.

Memory Tip

Think of measuring electric potential ('volt') with a device that 'measures' ('-meter'). This helps you remember that a voltmeter is used to measure volts.

Visually Confused Words