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No need, just for convenience. Eg the mass of an electron is 9.11*10^-31 kg = 8.19*10^-14 J/c^2 = 512000 eV/c^2.

Which is the easier number to work with? The mass in kg or J/c^2 which is so tiny you can't really grasp it (and it makes maths trickier, you've got to remember to keep all those powers of 10) or the mass in eV/c^2.

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Q: What is the need to define electron volt energy?
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In physics what is an electron volt?

In physics an electron volt is a very small unit of energy. An electron volt is the amount of energy gained by the charge of an electron once it has moved across an electric potential difference of one volt.


Blology unit to measure energy?

In biology, or elsewhere, the official unit for energy is the Joule. When talking about individual atoms or molecules, the unit electron-volt is also often used, for example, for the binding energy.In biology, or elsewhere, the official unit for energy is the Joule. When talking about individual atoms or molecules, the unit electron-volt is also often used, for example, for the binding energy.In biology, or elsewhere, the official unit for energy is the Joule. When talking about individual atoms or molecules, the unit electron-volt is also often used, for example, for the binding energy.In biology, or elsewhere, the official unit for energy is the Joule. When talking about individual atoms or molecules, the unit electron-volt is also often used, for example, for the binding energy.


What is the measure of electrical energy an electron carries?

The charge on an electron can be measured as -1e, or -1.602 176 487(40) * 10^-19 Coulombs.Energy of an electron is usually measured in electron Volts (eV). This dimensionally is the same as Joules (energy). The unit Volt is Joules per Coulomb (energy/charge).


Energy is measured in units?

The official (SI) unit of energy is the joule. Other common units include the calorie, the BTU, the electron-volt.


What is a measure of how much electrical energy each electron of a battery has?

The voltage (1 volt = 1 joule/coloumb)

Related questions

Define electron volt?

An electron volt is a unit of energy consisting of the energy resulting from the product of an electron through a potential of one volt, ev= .16E-18 Joules.


In physics what is an electron volt?

In physics an electron volt is a very small unit of energy. An electron volt is the amount of energy gained by the charge of an electron once it has moved across an electric potential difference of one volt.


What is longer unit of energy?

electron volt


What is the energy of sun in electron volt?

2.5 ev


What is an electron vault?

1 electron-volt is a small unit of energy. It's the amount of energy gained or lost by the (amount of electric charge on one electron) moving through a (potential difference of one volt). 1 joule of energy is the same as about 6,241,400,000,000,000,000 electron-volts.


What is the energy gap of a semiconductor?

It is in a range of 1eV. (eV=electron volt)


How is the electron volt related to the si unit of energy?

The SI unit of energy is the joule. The electron-volt, a non-standard (non-SI) unit, is equal to about 1.6 x 10-19 joule.


What is 7 trillion electron volts in mains voltage?

They're different things. An "electron volt" is not the same as a "volt". An "electron volt" is an amount of energy. It's the work you have to do in order to lift one electron to a place that's 1 volt more negative, and also the amount of energy that one electron loses when it falls to a place that's 1 volt more positive. "1 joule" of energy is the amount of energy you pay for if you use 1 watt for 1 second, and that's about 6,250,000,000,000,000,000 electron volts of energy. If you use 1,000 watts for 1 hour, you pay for 1 kilowatt-hour of energy. That's about 22,500,000,000,000,000,000,000,000 electron volts of energy, or 3.6 million joules. It costs around 15¢ to 25¢ in most places. The "7 trillion electron volts" in the question is something like the amount of energy that you'd have to pay for if you used 1 watt for 0.00000112 second. It's not much.


Can electronvolt converted to millivolt?

No; electron-volt is a measure of energy, not of voltage (or potential).


How many volts is 110keV?

There is no relationship between eV and V. An electron/volt is the energy acquired by an electron as it moves through an electric field of one volt. So 110 KeV is the energy acquired by an electron as it moves through an electric field of 110,000 volts.


Will 2.0 250 volt replace a 1.6 125 volt?

You need to define what you mean by 2.0 and 1.6.


If an electron gun electron is moved with electric potential of 9000 volt.then What will be the energy of electron in electron volt?

If an initially stationary electron falls through 9,000 volts of potential difference, then it arrives at the positive terminal with 9,000 eV of energy.