Question

Fill in the blank: \[1\,ev = \underline {} Joule\]

Answer 1

Hint: The word \[ev\] stands for Electron volt and it is the unit of energy. Joule is a deduced unit of energy in the International System of Units or SI units. Joule is the SI unit of work. 1 Joule is the quantum of work done when a force of 1 Newton displaces a body through a distance of 1m in the direction of the force applied.

Complete step by step solution:
We know that charge of the electron \[ = 1 \cdot 6 \times {10^{19}}C\]
So, \[1\,ev = 1 \cdot 6 \times {10^{19}}C \times 1\,volt\]
Now, \[1\,joule = 1volt \times 1\,Coulomb\]
\[1ev = 1 \cdot 6 \times {10^{19}}\,Joule\]

Hence \[1\,ev = \underline {1 \cdot 6 \times {{10}^{19}}}\,Joule\]

Additional information:
The electron volt is the unit of energy generally used in atomic and nuclear physics. The amount of energy gained by the charge of a single electron moved across an electric implicit difference \[1volt\] is called an electron volt. It is generally used in atomic and nuclear physics operations. The symbol of electron volt is \[ev\]. Joule is the SI unit of energy.

Note: The relation Between \[ev\] and Joule is proportionate. A change in the value will change the Joule original value in the same proportion. An electron volt is a unit used to describe the quantum of energy gained by an electron when it is being accelerated under an implicit difference of 1 volt. When an electron, at rest, is moved through a potential difference of 1V, whatever energy is gained by it is nominated as 1 eV.