Which of the following is unitless quantity?

Answer

A, C

Explanation

`V_(A)=3` volt, `V_(B)=7` volt
From energy conservation `("Energy")_(A)=("Energy")_(B)`
`rArr 1//2 mv^(2)-exx7V=-exx3V+0`
`rArr 1//2 mv^(2)=4eV`