Question

How do you solve this ??

Answer 1

Answer : Option A) 2.00 eV

Explanation : The conversion of J to eV is done with the following formula;

$E_{eV} = E_{J} X (6.241 X 10^{18})$

Here, we have the value of particle in terms of Joules which is 3.2 X $10^{-19}$

So, on substituting we get,
$E_{eV}$ = 3.2 X $10^{-19}$  X  $(6.241 X 10^{18} )$


$E_{eV}$ = 1.99 eV so, it can be rounded off to 2.00 eV.