Question

Two deutrons each of mass m fuse to form helium resulting in release of energy E. The mass of helium formed is
A. `m+E//c^(2)`
B. `2m+E//c^(2)`
C. `E//mc^(2)`
D. `2m-E//c^(2)`

Answer 1

Correct Answer - D
Total mass before fusion =2m
Mass converted into energy in this process `=E//c^(2)`
`:.` Mass of He formed =`(2m=E//c^(2))`