A) \[3.2\times {{10}^{-13}}J\]
B) \[1.6\times {{10}^{-13}}J\]
C) \[4.8\times {{10}^{-13}}J\]
D) \[6.4\times {{10}^{-13}}J\]
Correct Answer: B
Solution :
Mass of electron = mass of positron = 9.1 ´ 10-31kg Energy released \[E=(2m).{{c}^{2}}\] \[=2\times 9.1\times {{10}^{-31}}\times {{(3\times {{10}^{8}})}^{2}}\]= 1.6 ´ 10?13J.
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