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JEE Mains · Physics · STD 12 - 13. Nuclei

ऐल्फा क्षय का साधारण उदाहरण है \({ }_{92}^{238} \mathrm{U} \longrightarrow{ }_{90}^{234} \mathrm{Th}+{ }_2 \mathrm{He}^4+\mathrm{Q}\) दिया है: \({ }_{92}^{238} \mathrm{U}=238.05060 \mathrm{u},\) \({ }_{90}^{234} \mathrm{Th}=234.04360 \mathrm{u},\) \({ }_2^4 \mathrm{He}=4.00260 \mathrm{u}\)  \(1 \mathrm{u}=931.5 \frac{\mathrm{MeV}}{\mathrm{c}^2}\) \({ }_{92}^{238} \mathrm{U}\) के ऐल्फा क्षय के दौरान मुक्त हुई ऊर्जा \((\mathrm{Q})\)____________\(\mathrm{MeV}\) है।

  1. A \(3\)
  2. B \(2\)
  3. C \(1\)
  4. D \(4\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(4\)

Step-by-step Solution

Detailed explanation

Energy released \(=(\Delta m )_{ amu } \times 931.5\,MeV\) \(=\left( m _{ u }- m _{ Th }- m _{ He }\right)_{ amu } \times 931.5\,MeV\) \(=0.0044 \times 931.5\,MeV =4.0986\,MeV\)
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