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प्रश्न
Why is a very high temperature required for the process of nuclear fusion? State the approximate temperature required.
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उत्तर
When two nuclei approach each other, due to their positive charge, the electrostatic force of repulsion between them becomes too strong that they do not fuse. Thus, nuclear fusion is not possible at ordinary temperature and ordinary pressure.
Hence to make the fusion possible, a high temperature of approximately 107 K and high pressure is required. At such a high temperature, due to thermal agitations both nuclei acquire sufficient kinetic energy so as to overcome the force of repulsion between them when they approach each other, and so they get fused.
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संबंधित प्रश्न
Complete the following fusion reaction:
\[\ce {^2_1H + ^2_1H -> ^\underline{}_2He + ^1_\underline{}n + energy}\]
Name the process, nuclear fission or nuclear fusion, in which the energy released per unit mass is more?
The average energy released in each fusion reaction is about ______ J.
Elements having atomic number greater than 83 can undergo nuclear fusion.
Match: IV
| a. | Uncontrolled fission reaction | Hydrogen Bomb |
| b. | Fertile material | Nuclear Reactor |
| c. | Controlled fission reaction | Breeder reactor |
| d. | Fusion reaction | Atom bomb |
Use the analogy to fill in the blank.
Nuclear Fusion : Extreme temperature, Nuclear Fission : _______
Mark the correct choice as
- Assertion: Extreme temperature is necessary to execute nuclear fusion.
- Reason: In a nuclear fusion, the nuclei of the reactants combine releasing high energy.
Use the analogy to fill in the blank.
Nuclear Fusion: Extreme temperature, Nuclear Fission: ___________
Use the analogy to fill in the blank.
Nuclear Fusion: Extreme temperature, Nuclear Fission: ______.
Write nuclear reaction of nuclear fusion.
