Electron volt is the unit of

Options

A. power
B. Potential
C. Electron charge
D. Energy

Answer

To determine what the electron volt (eV) is a unit of, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electron Volt**:
- The electron volt is commonly abbreviated as eV. It is a unit that relates to the energy gained by an electron when it moves through an electric potential difference.

2. **Definition of Electron Volt**:
- One electron volt is defined as the amount of energy gained by a single electron when it is accelerated through a potential difference of one volt.

3. **Conversion to Joules**:
- We can express the electron volt in terms of joules. The conversion is given as:
\[ 1 \, \text{eV} = 1.6 \times 10^{-19} \, \text{joules} \]

4. **Understanding Joules**:
- Joules (J) is the SI unit of energy. Since the electron volt can be converted to joules, it indicates that the electron volt is also a measure of energy.

5. **Conclusion**:
- Therefore, the electron volt is a unit of energy.

### Final Answer:
The electron volt is the unit of energy.

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