1.

If a proton and anti-proton come close to each other and annihilate, how much energy will be released [DCE 1999; 2003]

A.            \[1.5\times {{10}^{-10}}J\]     
B.            \[3\times {{10}^{-10}}J\]
C.            \[4.5\times {{10}^{-10}}J\]     
D.            None of these
Answer» C.            \[4.5\times {{10}^{-10}}J\]     


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