Tag: physics

Questions Related to physics

Health hazards related to nuclear radiations are:

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  1. They can cause cancer.

  2. They can cause deformity in the body.

  3. They can damage the genes of a person.

  4. All of the above.

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Correct Option: D
Explanation:

Nuclear radiations are extremely harmful to human health. They can cause:

1. The radiations can affect body cells and this may cause cancer.
2. The radiations have the capability to damage the genes of a person and this can be transferred to the next generation.
3. The radiations can cause permanent incurable deformity in human body.

What is Chain Reaction?

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  1. Particles released by splitting of atom strikes other uranium atoms and split them.

  2. Particles released by expanding of atom strikes other uranium atoms and split them.

  3. Particles released by contracting of atom strikes other uranium atoms and split them.

  4. None

Show answer
Correct Option: A
Explanation:

A self sustaining reaction where the neutrons bombard an atom resulting in the fission process which leads to the release of more neutrons which then bombards more atoms and the cycles goes on.

What is known as process of splitting of an atom?

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  1. Nuclear Fusion

  2. Nuclear Fission

  3. Nuclear Confusion

  4. Nuclear Dillusion

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Correct Option: B
Explanation:

Splitting of a large atomic nucleus into smaller particles is called nuclear fission.

Which energy is produced by nuclear fission or nuclear fusion?

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  1. Thermal Energy

  2. Geothermal energy

  3. Nuclear energy

  4. Tidal Energy

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Correct Option: C
Explanation:

Nuclear energy can be of two types: nuclear fission and nuclear fusion. Both the types is used for the generation of electricity.

Fill in the blanks:
1 kg coal can light up 1 bulb for _____ hours.

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  1. 6

  2. 8

  3. 7

  4. 5

Show answer
Correct Option: B
Explanation:

1 kg of coal can light the bulb for 8 hours whereas 1 kg of uranium can light the bulb for 3 x 10$^4$ years.

From below which are the disadvantages of nuclear energy?

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  1. High set up cost

  2. low set up cost

  3. Waste products are useful

  4. None

Show answer
Correct Option: A
Explanation:

Energy generation from the nuclear energy is greater than from any non-conventional sources of energy. But it has some disadvantages too, such as:

1. Cost of nuclear power plant set up is very high.
2. Waste generated are hazardous to health and environment.

State whether the given statement is True or False :
Nuclear power plants as compared to other plants can generate huge amount of electricity. 

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  1. True

  2. False

Show answer
Correct Option: A
Explanation:

With a complete combustion or fission, approx. $8 \ kWh$ of power can be generated from $1\  kg$ of coal, approx. $12 \ kWh$ power from $1\  kg$ of mineral oil and around $24,000,000\  kWh$ of power from $1 \ kg$ of Uranium-$235$.

State whether the given statement is True or False :
Waste products emitted from nuclear power plants are very harmful.

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  1. True

  2. False

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Correct Option: A
Explanation:

Waste products formed during nuclear reactions are highly radioactive in nature and cannot be disposed into the environment directly. Wastes needs to be processed before releasing it into the environment.

1 kg of ________ can light up $1$ bulb for $3\times10^4$ years.

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  1. Uranium

  2. Halonium

  3. Neutronium

  4. Hydronium

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Correct Option: A
Explanation:

1 kg of coal can light the bulb for 8 hours whereas 1 kg of uranium can light the bulb for 3 x 10$^4$ years.

Radiations from a nuclear power plant is harmful to: 

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  1. environment

  2. human civilization

  3. wildlife

  4. all of the above

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Correct Option: D
Explanation:

Radiation from the radioactive elements pollutes not only the environment but also the civilization coming in contact with it. It causes radiation sickness which left untreated causes fatality.