Wattage Definition & Meaning

Wattage is a measurement of energy over a period of time and is the term of measurement for electrical energy. Devices and all other items that use electricity have an ideal input and output wattage, which indicates how much electrical energy they require to run and how much they emit. Wattage is calculated by multiplying potential electrical energy by electrical current.

Potential electrical energy is voltage; the force exerted on charge to make it move. Electrical current is measured in amperes; one unit of electrical charge (coulombs) per second. Multiplied together, voltage and amperes equal wattage:

If W = V x A

Each electrical device that has a rechargeable battery inside must receive a higher voltage than the current voltage within the depleted battery. When the device is plugged into the wall, the ensuing voltage provides new electrical charge to the battery within it.

Each item (such as a lamp or vacuum cleaner or anything that needs electricity) has an ideal input wattage, which indicates how much electrical energy the item needs to be powered. If that wattage is exceeded, the item could be damaged because the current overpowers the circuits-it can’t handle that level of electrical power. This can damage the item, or it can cause electrical fires and could destroy property. Items also have an ideal electrical output in watts-how much energy the item emits when sufficiently powered. This includes computers, phones, and other electronic devices. Resistors and amplifiers within a circuit regulate the power that the circuit outputs, controlling the voltage and amps so that the circuit maintains the right flow of current.

Wattage is also how electric companies measure and track electricity use.

 

Related Links

Jenna Phipps
Jenna Phipps
Jenna Phipps is a contributor for websites such as Webopedia.com and Enterprise Storage Forum. She writes about information technology security, networking, and data storage. Jenna lives in Nashville, TN.

Top Articles

The Complete List of 1500+ Common Text Abbreviations & Acronyms

Text Abbreviations reviewed by Web Webster   From A3 to ZZZ we list 1,559 SMS, online chat, and text abbreviations to help you translate and understand...

How to Create a Website Shortcut on Your Desktop

Website Shortcut on Your Desktop reviewed by Web Webster   This Webopedia guide will show you how to create a website shortcut on your desktop using...

Windows Operating System History & Versions

The Windows operating system (Windows OS) refers to a family of operating systems developed by Microsoft Corporation. We look at the history of Windows...

First to Fifth Generations of Computers

Reviewed by Web Webster   Learn about each of the 5 generations of computers and major technology developments that have led to the computing devices that...

Heuristic Definition and Meaning

Heuristic, pronounced hyoo-ri-stihk, is a Greek term for individually finding or discovering. In...

Hackerspace Definition & Meaning

What is a hackerspace? A hackerspace, also known as a hacklab, incubator, or hackspace,...

Random Access Memory (RAM)...

Random Access Memory (RAM) reviewed by Web Webster   Random Access Memory (RAM) is a...