Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 2

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The average binding energy per nucleon in the nucleus of an atom is approximately

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Important Questions on Nuclei

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 3

Which of the alternatives gives correct match of Column-I with Column-II?

Column-I		Column-ll
a.	Binding energy per nucleon for ${}^{56}{Fe}$	(i)	$5.5 MeV$
b.	Energy of $\alpha$-particle in Geiger Marsden experiment	(ii)	$200 MeV$
c.	Energy of photon of visible light	(iii)	$8.8 MeV$
d.	Energy released in fission of a uranium nucleus	(iv)	$2 eV$

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 5

Which of these is incorrect about nuclear forces?

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 6

If a heavy nucleus has

\frac{N}{Z}

ratio higher than that required for stability, then

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 7

After

3

hours, only

0.25 mg

of a pure radioactive material is left. If initial mass was

2 mg

then the half life of the substance is

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 8

Pauli suggested the emission of neutrino during

β^{+}

decay to explain

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 9

Half lives for $\alpha$ and

β

emission of a radioactive material are

16

years and

48

years respectively. When material decays giving

α

and

β

emission simultaneously then time in which

\frac{3}{4}

th of the material decays is

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 10

Two radioactive samples

A

and

B

have half lives

T_{1}

and

T_{2} (T_{1} > T_{2})

respectively. At

t = 0,

the activity of

B

was twice the activity of

A .

Their activity will become equal after a time

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 11

N

atoms of a radioactive element emit

n

number of

α

-particles per second. Mean life of the element in seconds is