Question

8.
Energy equal to the mass of one electron is
1) 8.2 x 10-7erg 2) 9.2 x 10-8erg
3)​

Answer 1

Answer:

Mass of one electron = 9.1091 x 10^-31 kg

According to the Einstein's theory of relativity,

Mass and energy are interchangeable...

So,

9.1091 x 10^-31 kg = 0.511 MeV

1 MeV= 1.602 × 10-6 erg

So, 0.511 MeV = 8.187 × 10-7 erg

THUS,

Mass of one electron = 8.187 × 10-7