The electron-volt is _____ than the SI unit for the same physical quantity.
a. smaller
b. greater
A
smaller
the charge on an electron is much smaller than one Coulomb
To determine whether the electron-volt (eV) is smaller or greater than the SI unit for the same physical quantity, we need to first identify the SI unit for that physical quantity.
The SI unit for energy is the joule (J). So, we can compare the electron-volt to the joule to determine the answer to the question.
To do this, we need to know the conversion between electron-volts and joules. It is commonly known that 1 electron-volt is equivalent to 1.60218 x 10^-19 joules.
Comparing the magnitudes of the two units, we can conclude that the electron-volt (eV) is smaller than the joule (J).
Therefore, the answer to the question is:
a. smaller