NEET Physics Nuclei Questions Solved

Watch Physics > Nuclei Videos
play button

The rest energy of an electron is

(a) 510 KeV            (b) 931 KeV
(c) 510 MeV            (d) 931 MeV

(a) Rest energy of an electron = mec2
Here me=9.1×10-31 kg and c = velocity of light
 Rest energy = 9.1×10-31×3×1082 joule
=9.1×10-31×(3×108)21.6×10-19eV=510 keV

 

Difficulty Level:

  • 20%
  • 10%
  • 10%
  • 62%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 18, 2019)