HARD

Earn 100

$_{35} X^{88}$ is an unstable isotope which decays in two successive steps to produce stable isotope of $_{35} X^{88} \overset{I}{\to} Z {\overset{II}{\to}}_{36} Y^{87}$ . The correct statement (s) is/are:

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Important Questions on Nuclear Physics

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

200 MeV

energy is released when one nucleuls of

{}^{235}U

undergoes fission. The approximate energy released by fission of

2 kg

of uranium is

MEDIUM

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

When

{{}_{92}U}^{235}

undergoes fission, about

0.1 %

of the original mass is converted into energy. The energy released when

1 kg

{{}_{92}U}^{235}

undergoes fission is

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

5 mg

{}^{235}U

is completely destroyed in an atom bomb, then approximate total energy released is (given that the energy released per fission is

200 MeV

)

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

Write one balanced equation to show Nuclear fission.

MEDIUM

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

The ratio of the energy released by

4 kg

of hydrogen at sun by fusion process to

23.5 kg

{}^{235}U

in the nuclear reactor by fission process is (Assume energy released per fusion is

26 MeV

and that per fission is

200 MeV

)

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

The explosion of atom bomb is based on the principle of

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

In a nuclear reactor heavy nuclei is not used as moderators because

MEDIUM

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

The Binding energy per nucleon of

{}_{3}^{7}{L i}

and

{}_{2}^{4}{H e}

nucleon are

5.60 M e V

and

7.06 M eV

, respectively. In the nuclear reaction

_{3}^{7} L i +_{1}^{1} H \to_{2}^{4} H e +_{2}^{4} H e + Q

, the value of energy

Q

released is

HARD

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

In a reactor,

2 kg

{}_{92}U^{235}

fuel is fully used up in

30

days. The energy released fission is

200 MeV

. Given that the Avogadro number,

N = 6.023 \times 10^{26}

per kilo mole and

1 eV = 1.6 \times 10^{- 19} J

. The power output of the reactor is close to:

MEDIUM

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

When a uranium isotope

{}_{92}^{235}U

is bombarded with a neutron, it generates

{}_{36}^{89}{Kr}

, three neutrons and:

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

What do you understand by nuclear fission? Explain the process with the help of nuclear reaction.

HARD

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

A fission reaction is given by

{}_{92}^{236}U \to {}_{54}^{140}{X e} + {}_{38}^{94}{S r} + x + y

, where

x

and

y

are two particles. Considering

{}_{92}^{236}U

to be at rest, the kinetic energies of the products are denoted by

K_{X e}, K_{S r}, K_{x} (2 M e V)

and

K_{y} (2 M e V)

, respectively. Let the binding energies per nucleon of

{}_{92}^{236}U, {}_{54}^{140}{X e}

and

{}_{38}^{94}{S r}

7.5 MeV

8.5 MeV

, and

8.5 MeV

respectively. Considering different conservation laws, the correct option(s) is (are)

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

The sun releases energy by

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

In a nuclear reactor, the main purpose of the moderator is to

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

The energy released per fission of nucleus of ${}^{240}X$ is $200 MeV$ . The energy released if all the atoms in $120 g$ of pure ${}^{240}X$ undergo fission is _____ $\times 10^{25} MeV$ .

(Given $N_{A} = 6 \times 10^{23}$ )

MEDIUM

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

An electron, a doubly ionized helium ion

({He}^{+ +})

and proton are having the same kinetic energy. The relation between their respective de-Broglie wavelength

λ_{e}, λ_{{He}^{+ +}}

and

λ_{p}

is :

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

Define nuclear fission.

EASY

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

If the energy released in the fission of one nucleus is

3.2 \times 10^{- 11} J

, then number of nuclei required per second in a

16 kW

power plant is

MEDIUM

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

Rewrite and complete the following nuclear reaction by filling in the atomic number of Ba and mass number of Kr:

${}_{92}^{235}U + {}_{0}^{1}n \to {}_{___}^{144}{Ba} + {}_{36}^{___}{Kr} + 3 {}_{0}^{1}n + Energy$

MEDIUM

Physics>Modern Physics>Nuclear Physics>Fission and Fusion Processes

2 M e V

neutron is emitted in a fission reactor. If it looses half of its kinetic energy in each collision with a moderator atom, how many collisions must it undergo to achieve thermal energy of

0.039 e V

35X88 is an unstable isotope which decays in two successive steps to produce stable isotope of 35X88→IZ→II 36Y87. The correct statement (s) is/are:

Important Questions on Nuclear Physics

Learn and Prepare for any exam you want !

$_{35} X^{88}$ is an unstable isotope which decays in two successive steps to produce stable isotope of $_{35} X^{88} \overset{I}{\to} Z {\overset{II}{\to}}_{36} Y^{87}$ . The correct statement (s) is/are: