NEET Physics Nuclear Fusion MCQ Question
What is the approximate temperature at which two protons in a proton gas have enough energy to overcome the Coulomb barrier, given that the barrier height is ~400 keV?
6 × 10^9 K
5 × 10^7 K
5.7 × 10^8 K
3 × 10^10 K
Correct Answer
Detailed Explanation
The NCERT mentions that for fusion, protons need energy to overcome a 400 keV barrier. Using kT ≈ 1/40 eV per Kelvin, 400 keV corresponds to approximately 4.6 × 10^9 K.
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