slow down the bombarding neutrons

accelerate the bombarding neutrons

EASY

Earn 100

What term is used to describe spontaneous nuclear fission amongst several nuclei?

Important Questions on Nuclear Physics

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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>Nuclear Fission

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>Nuclear Fission

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>Nuclear Fission

Write one balanced equation to show Nuclear fission.

MEDIUM

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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>Nuclear Fission

The explosion of atom bomb is based on the principle of

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

Define nuclear fission.

HARD

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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>Nuclear Fission

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>Nuclear Fission

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

HARD

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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>Nuclear Fission

The sun releases energy by

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

A nuclear fission is said to be critical when multiplication factor of

k

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

Moderator is used to

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Fission

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>Nuclear Fission

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>Nuclear Fission

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

What term is used to describe spontaneous nuclear fission amongst several nuclei?

Important Questions on Nuclear Physics

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