The energy equivalent of 1 g of substance is:

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Solution

Q.
The energy equivalent of 1 g of substance is: [2024]

1 $11.2 \times 10^{24} M e V$

2 $5.6 \times 10^{12} M e V$

3 $5.6 e V$

4 $5.6 \times 10^{26} M e V$

Ans.
(4)

$E = 10^{- 3} \times 9 \times 10^{16} J (∵ E = M c^{2})$

$E = 9 \times 10^{- 13} J$

$1 J = \frac{1}{1.6 \times 10^{- 19}} e V$

$E = 9 \times 10^{13} \times \frac{1}{1.6 \times 10^{- 19}} eV = 5.6 \times 10^{26} MeV$

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