slow down the bombarding neutrons

accelerate the bombarding neutrons

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A chain reaction is possible when the mass of the fuel is greater than the

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Important Questions on Nuclear Physics

MEDIUM

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

A nuclear fuel rod generates energy at a rate of

5 \times 10^{8} W m^{- 3} .

It is in the shape of a cylinder of radius

4.0 mm

and length

0.20 m .

A coolant of specific heat

4 \times 10^{3} J {kg}^{- 1} K^{- 1}

flows, past it at a rate of,

0.2 kg s^{- 1}

. The temperature rise in this coolant is approximately,

MEDIUM

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

For nuclei with mass number close to

119

and

238

, the binding energies per nucleon are approximately

7.6 MeV

and

8.6 MeV

, respectively. If a nucleus of mass number

238

breaks into two nuclei of nearly equal masses, what will be the approximate amount of energy released in the process of fission?

MEDIUM

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

A nucleus with mass number

184

initially at rest emits an

α -

particle. If the

Q

value of the reaction is

5.5 MeV,

calculate the kinetic energy of the

α -

particle.

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

The binding energy per nucleon of

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

and

{}_{2}{He}^{4}

nuclei are

5.60 MeV

and

7.06 MeV,

respectively. Then, in the nuclear reaction

{{}_{3}L}^{7} + {{}_{1}H}^{1} ⟶ {}_{2}{He}^{4} + {}_{2}{He}^{4} + Q,

the value of

Q .

the energy released, is

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

In a nuclear reactor, the following fission reaction occurs

${}_{92}^{235}U + {}_{0}^{1}n \to {}_{56}^{141}{Ba} + {}_{36}^{92}{Kr} + neutrons$

Control rods made of Cadmium are inserted to remove extra neutrons. How many neutrons need to be removed for each of the above reactions so that the reactor remains critical?

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

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

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

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

k

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

The most suitable element for nuclear fission is the element with atomic number near

HARD

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

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 Reactor

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 Reactor

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 Reactor

The energy of the fast neutrons emitted in a nuclear fission reactor is approximately _____

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

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 Reactor

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 Reactor

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

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Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

The sun releases energy by

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

The explosion of atom bomb is based on the principle of

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

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 Reactor

In nuclear reactor, cadmium rods are used as:

EASY

Physics>Modern Physics>Nuclear Physics>Nuclear Reactor

Moderator is used to

A chain reaction is possible when the mass of the fuel is greater than the

Important Questions on Nuclear Physics

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