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Chain Reaction and Nuclear Energy

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Questions and Answers

What is the purpose of using moderators like heavy water or graphite in nuclear reactors?

To increase the rate of energy release

To prevent the release of energy

To decrease the rate of energy release

To control the chain reaction (correct)

What is the principle used in making an atom bomb?

Uncontrollable release of energy (correct)

Absorption of neutrons by moderators

Controlled Chain Reaction

Spontaneous release of energy

What is the role of the neutrons formed during fusion in a nuclear reactor?

To absorb heavy water and graphite

To prevent the release of energy

To cause uncontrollable chain reaction

To produce steam for running electric turbines (correct)

What is the primary purpose of tapping nuclear energy in advanced countries?

<p>To meet the growing demand for electric energy</p> Signup and view all the answers

What happens when one atom of Uranium undergoes fission?

<p>It breaks down into smaller atoms</p> Signup and view all the answers

Study Notes

Nuclear Reactors and Fission

Moderators like heavy water or graphite are used in nuclear reactors to slow down neutrons, increasing the chances of further fission reactions and sustaining a chain reaction.
The principle used in making an atom bomb is a rapid, uncontrolled nuclear chain reaction, releasing a massive amount of energy in a short time.

Neutrons in Fusion Reactions

Neutrons formed during fusion in a nuclear reactor are absorbed by the surrounding material, helping to regulate the reaction and prevent it from getting out of control.

Tapping Nuclear Energy

The primary purpose of tapping nuclear energy in advanced countries is to generate electricity on a large scale, providing a reliable and clean source of power.

Uranium Fission

When one atom of Uranium undergoes fission, it releases 2-3 neutrons, which then go on to collide with other uranium atoms, causing them to split and release more neutrons, thereby sustaining a chain reaction.

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Description

Learn about the principles of chain reactions, energy release, and control in the context of nuclear fission and fusion. Understand how neutrons are utilized to initiate and sustain the chain reaction, leading to the release of energy.