Watt

A Watt is a measure of electrical power. The power through a circuit in Watts is given by the voltage * current.

Equations

• P = U×I

Could also be written as

• I = P÷U
• U = P÷I

Where P is Power, I is Current and U isVoltage

These equations is closely related to and is often used together with Ohm's Law

Example

A 110 Watt bulb connected to the wall in the US (110 volts) would be drawing 1 amp(current) . 110volts * 1amps = 110 watts.

SI multiples for Watt (W)

Submultiples				Multiples
Value	Symbol	Name		Value	Symbol	Name
10−1 W	dW	deciWatt		101 W	daW	decaWatt
10−2 W	cW	centiWatt		102 W	hW	hectoWatt
10−3 W	mW	milliWatt		103 W	kW	kiloWatt
10−6 W	µW	microWatt		106 W	MW	megaWatt
10−9 W	nW	nanoWatt		109 W	GW	gigaWatt
10−12 W	pW	picoWatt		1012 W	TW	teraWatt
10−15 W	fW	femtoWatt		1015 W	PW	petaWatt
10−18 W	aW	attoWatt		1018 W	EW	exaWatt
10−21 W	zW	zeptoWatt		1021 W	ZW	zettaWatt
10−24 W	yW	yoctoWatt		1024 W	YW	yottaWatt
Common prefixed units are in bold face.

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