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Q.

Energy equal to the mass of one electron is

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a

4.1 × 10^–8erg

b

9.2 × 10–8erg

c

8.2 × 10^–10erg

d

8.2 × 10^–7erg

answer is A.

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Detailed Solution

$E = m c^{2} = 9.1 \times 10 - 34 K g \times {(3 \times 10^{8})}^{2} = 8.2 \times 10^{- 14} J = 8.2 \times 10^{- 7} e r g$

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