It depends on context. If the potential difference is an electromotive force, then it's symbol is usually E. For all other potential differences (e.g. voltage drops), the symbol is usually either V or U (with the latter symbol used throughout Europe). Symbols for quantities, such as these, are italicised.
With alternating-current circuits, upper case letters (E, V, U) are used to represent peak or r.m.s. values, whereas lower-case letters (e, v, u) are used to represent instantaneous values.
'Voltage' means 'potential difference'. So you cannothave a 'voltage difference' which would mean 'potential difference difference'! If you are asking what the symbol for 'voltage' is, then it could be italicised letters E (usually representing the e.m.f. or voltage of a source), or V, or U.
There is the symbol V or E for voltage. More you can read here: Scroll down to related links and look at "Volts - Ohms - Amperes - Watts".
The symbol for electrical volts is "V".
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The symbol for voltage is the letter E. It stands for Electromotive force known as EMF.
V
Volt
a voltmeter is used to measure voltage
A potentiometer is a variable resistor, while a voltmeter is a device that measures voltage.
It depends on the country as to which voltage is used for industrial purposes. In the US, for welding for example, voltage may be 480 volts. The frequency in the US is 60 Hertz.
A transformer can be used, either a step-up or step-down transformer, to deliver the power at a different voltage from the normal supply voltage.
voltage
a sine wave (~)
The symbol 'u' is often used in place of the prefix 'micro-' in math and physics.AnswerThe symbol U is used to represent voltage. In this context, a lower-case 'u' represents an instantaneous AC voltage. In thermodynamics, it is used to represent internal energy.
The symbol used for amperage in formulas is the letter "I", for voltage "E" for watts "W". The formula for watts is W = I x E.CommentThe symbol for electric current is I; the symbol for ampere is A. The symbol for voltage is E, V, or U, depending upon context, and the symbol for volt is V. The symbol for power is P, and the symbol for watt is W.
The symbol is actually a letter. The original letter was an E which stood for Electromotive force. Now-days the E is substituted by the letter V which of course stands for voltage.
V
The symbol V stands for voltage.
The symbol for electrical volts is "V". <<>> The symbol for voltage is the letter E. It stands for Electromotive force known as EMF.
In physics, what is the symbol that looks like a horseshoe, and relation to voltage
rail way gates
E = Voltage drop V = Voltage
Voltage is not "used" Voltage is constant.
The most common symbol used for DC voltage is two, short, parallel horizontal lines, only the bottom one is dashed. Click here for an image: http://upload.wikimedia.org/wikipedia/commons/9/9f/Direct_current_symbol.svgAnswerThe ISO recommends lower case letters as follows: d.c., except where it is used at the start of a sentence, where it should be capitalised: D.C. For example:"A voltage of 12 V d.c.""D.C. voltages are supplied by batteries."