Joule to Electron Volt Calculator
Convert energy from Joules (J) to Electron Volts (eV)
How to Convert Joules to Electron Volts
Basic Conversion Formula
Practical Examples
Examples:
- Converting 1 Joule to electron volts: eV = 1 J / (1.602 × 10-19) ≈ 6.242 × 1018 eV
- Converting 5 Joules to electron volts: eV = 5 J / (1.602 × 10-19) ≈ 3.121 × 1019 eV
- Converting 10 Joules to electron volts: eV = 10 J / (1.602 × 10-19) ≈ 6.242 × 1019 eV
Explanation of Terms
eV (Electron Volt)
A unit of energy commonly used in the field of particle physics. It represents the energy gained by an electron when it is accelerated through a potential difference of one volt.
Joule to Electron Volt Conversion Table
| Joule (J) | Electron Volt (eV) |
|---|---|
| 1 J | 6.242 × 1018 eV |
| 5 J | 3.121 × 1019 eV |
| 10 J | 6.242 × 1019 eV |
| 20 J | 1.248 × 1020 eV |
| 50 J | 3.121 × 1020 eV |
| 100 J | 6.242 × 1020 eV |
| 1,000 J | 6.242 × 1021 eV |
| 2,000 J | 1.248 × 1022 eV |
| 5,000 J | 3.121 × 1022 eV |
| 10,000 J | 6.242 × 1022 eV |
FAQs
What is a Joule (J)?
A Joule (J) is the SI unit of energy. It represents the energy transferred when one newton of force moves an object one meter in the direction of the force.
What is an Electron Volt (eV)?
An Electron Volt (eV) is a unit of energy commonly used in particle physics and atomic-scale energy measurements. It is the amount of kinetic energy gained or lost by an electron when it is accelerated through an electric potential difference of one volt.
1 eV = 1.602 × 10⁻¹⁹ Joules (J).
Why are Electron Volts used instead of Joules?
Electron Volts are used in contexts where the energies are extremely small, such as in atomic, nuclear, and particle physics. They provide a more convenient unit when dealing with subatomic particles.
How is the Electron Volt used in real life?
Particle physics: Measuring the energy of particles like electrons, protons, and photons.
Semiconductor physics: Describing energy levels in atoms and the behavior of electrons in semiconductors.
X-ray energy: The energy of X-ray photons is often expressed in eV.
Can I approximate the conversion for small values?
Yes, for small energy conversions:
1 eV ≈ 1.602 × 10⁻¹⁹ J
1 J ≈ 6.242 × 10¹⁸ eV
This approximation is generally sufficient for most particle physics or atomic-scale calculations.
