Question

Electron volt is the unit of
A. energy
B. potential difference
C. charge
D. charge to mass

Answer 1

- Hint: Here we will proceed by defining the term electron volt and then we will be discussing how it becomes the unit of energy along with its values, symbol and its metric prefixes.

Complete step-by-step solution -

Definition of Electron volt: Electron volt (symbol eV) is the amount of kinetic energy gained (or lost) by a single electron accelerating from rest through an electric potential difference of one volt in vacuum.
Electron volt, is the unit of energy commonly used in atomic and nuclear physics. The electron volt equals \[1.602 \times {10^{ - 12}}{\text{erg}}\] or \[1.602 \times {10^{ - 19}}{\text{joule}}\].
So, electron volt is the unit of energy.
Thus, the correct option is A. energy

Note: When used as a unit of energy, the numerical value of 1 eV in joules (symbol J) is equivalent to the numerical value of charge of an electron in coulombs (symbol C). And it is commonly used with the metric prefixes milli-, kilo-, mega-, giga-, tera- and peta- etc.