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Nuclei — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
MCQ
Why high temperature is required for Nuclear fusion?
  • A
    All nuclear reactions absorb heat.
  • B
    The particles can not come together unless they are moving rapidly.
  • C
    The binding energy must be supplied from an external source.
  • D
    The mass defect must be supplied.
✓

Answer

  1. The particles can not come together unless they are moving rapidly.

Explanation:

Fusion reaction takes place at temperatures around 107k. It requires this high temperature so that nucleus start moving at rapidly speed, which in turn increases their kinetic, so that they overcome the repulsion between them and can come together.

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