1 electron volt= __________ J.

1-electron-volt-j

1 electron volt= __________ J.
A. 1.6*10^-19
B. 4.8*10^-19
C. 1.6*10^-10
D. 10

The correct choice is A. 1.6*10^-19

1 electron volt is the amount of work done if an electron is passed through a potential difference of 1V. Therefore the work done = 1V*charge of an electron = 1.602*10^-19 J. But it is a small quantity and hence we use kilo electron volt and mega electron volt in practical.