Question

suppose a scientist had choosen to measure small energy in proton volts rather than electron volts. what difference would it make?​

Answer 1

A new unit for measuring small energy in "proton volts" instead of "electron volts" will not make any difference.

First of all , let's define the two units:

• Electron volt (eV) is a unit of energy representing the energy possessed by an electron when accelerated through a potential difference of 1 Volt.

• Proton volt (pV) is a unit of energy representing the energy possessed by a proton when accelerated through a potential difference of 1 volt.

Now, the value of both this units will be same because the magnitude of charge of electrons and protons are equal.

• Now , the only difference will be in the fact that a proton will move in an opposite direction as compared to the electron accelerated in an electric field.

So, there will be no difference in using pV instead of eV.

$\star$ Hope It Helps.