Question

1.
2.
3.
4.
Answer (Detailed Solution Below)

Option 1 : $28.3$ MeV / $28.3$ MeV

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Detailed Solution

सही उत्तर $28.3$ MeV / $28.3$ MeV है।

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Question:

The mass of a $^{4}\text{He}$ nucleus is $4.002603$ u, while $m_{p} = 1.007825$ u and $m_{n} = 1.008665$ u ($1$ u $= 931.5$ MeV/$c^{2}$). The binding energy of the $^{4}\text{He}$ nucleus is / $^{4}\text{He}$ नाभिक का द्रव्यमान $4.002603$ u है, जबकि $m_{p} = 1.007825$ u और $m_{n} = 1.008665$ u ($1$ u $= 931.5$ MeV/$c^{2}$)। $^{4}\text{He}$ नाभिक की बंधन ऊर्जा है

1.
$28.3$ MeV / $28.3$ MeV
2.
$7.07$ MeV / $7.07$ MeV
3.
$931.5$ MeV / $931.5$ MeV
4.
$-28.3$ MeV / $-28.3$ MeV

Correct Answer: $28.3$ MeV / $28.3$ MeV

Mass defect $\Delta m = 2m_{p} + 2m_{n} - m(^{4}\text{He}) = 0.030377$ u, so $BE = \Delta m c^{2} = 0.030377 \times 931.5 = 28.3$ MeV (positive: the bound nucleus is lighter than its separated constituents). / द्रव्यमान क्षति $\Delta m = 2m_{p} + 2m_{n} - m(^{4}\text{He}) = 0.030377$ u, अतः $BE = \Delta m c^{2} = 0.030377 \times 931.5 = 28.3$ MeV (धनात्मक: बद्ध नाभिक अपने पृथक घटकों से हल्का है)।

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