Energy equal to the mass of one electron is 

Options

A. `8.2 xx 10^(-7)` erg
B. `9.2 xx 10^(-8)` erg
C. `8.2 xx 10^(-10)` erg
D. `4.1xx10^(-8)` erg

Answer

A

Explanation

`E= mc^2`
`E = 9.1 xx 10^(-31) xx (3x 10^8 )^2 = 8.2 xx 10^(-7) ` erg