AIEEE 2004 | Atoms and Nuclei Question 241 | Physics

The binding energy per nucleon of deuteron $$\left( {{}_1^2\,H} \right)$$ and helium nucleus $$\left( {{}_2^4\,He} \right)$$ is $$1.1$$ $$MeV$$ and $$7$$ $$MeV$$ respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released is

$$23.6\,\,MeV$$

$$26.9\,\,MeV$$

$$13.9\,\,MeV$$

$$19.2\,\,MeV$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which of the following radiations has the least wavelength ?

$$\gamma $$ - rays

$$\beta $$ - rays

$$\alpha $$ - rays

$$X$$ - rays

AIEEE 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

When a $${U^{238}}$$ nucleus originally at rest, decays by emitting an alpha particle having a speed $$'u',$$ the recoil speed of the residual nucleus is

$${{4\mu } \over {238}}$$

$$ - {{4\mu } \over {234}}$$

$$ {{4\mu } \over {234}}$$

$$ - {{4\mu } \over {238}}$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

A radioactive sample at any instant has its disintegration rate $$5000$$ disintegrations per minute. After $$5$$ minutes, the rate is $$1250$$ disintegrations per minute. Then, the decay constant (per minute) is

$$0.4$$ $$ln2$$

$$0.2$$ $$ln2$$

$$0.1$$ $$ln2$$

$$0.8$$ $$ln2$$

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