Nuclear Energy

IMPORTANT

Nuclear Energy: Overview

This topic deals with the concept of nuclear energy. It explains the phenomenon of nuclear fission and fusion in detail with examples. The process of controlled thermonuclear fusion is also described here.

Important Questions on Nuclear Energy

EASY
IMPORTANT

What type of nuclei is (preferably) needed for slowing down fast neutrons?

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IMPORTANT

If the nucleons of a nucleus are separated far apart from each other, the sum of masses of all these nucleons is larger than the mass of the nucleus.

Calculate the energy released if    U 238  nucleus emits an   α particle.

Given:

Atomic mass of   238 U=238.0508u

Atomic mass of   234 Th=234.04363u

Atomic mass of alpha-particle =4.00260uand1u=931 MeV c 2

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Can uncontrolled chain reaction can be controlled? explain.

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What is the underlying principle of the atomic bomb in respect of nuclear energy.

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What is the proton-proton chain reaction? Describe this process.

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The _____ is an example of endoergic nuclear reaction.

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Describe the endoergic nuclear reaction?

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When the energy value Q is positive, the reaction is positive.

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When the energy value Q is positive, the reaction is_____

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Hydrogen bomb has been prepared by the fusion of:

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Describe the working of Hydrogen bomb.

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The explosion of hydrogen bomb is based on the principle of:

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The average energy released in each fusion reaction is about _____ ×10-12 J.

(Two decimals should be there in the answer.)

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Which of the following is/are correct?
i. Chain reaction takes place in a nuclear reactor and an atomic bomb.
ii. The chain reaction in a nuclear reactor is controlled.
iii. The chain reaction in a nuclear reactor is not controlled.
iv. No chain reaction takes place in an atom bomb.

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IMPORTANT

Proton - Proton chain reaction is an example of nuclear _____.

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Identify nuclear fusion reaction

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Identify nuclear fusion reaction.

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The primary purpose of the coolant in a nuclear reactor is to reduce the danger of overheating the structure of the reactor.

MEDIUM
IMPORTANT

If 200 MeV of energy is released in the fission of one nucleus of U92235, the number of nuclei that must undergo fission to release an energy of 1000 J is

HARD
IMPORTANT

How is a nuclear chain reaction controlled in a nuclear reactor?