Q. The term Greenwald limit, recently seen in the news, is related to:

[A] Maximum permissible radiation exposure in nuclear power plants

[B] Upper limit on uranium enrichment in nuclear reactors

[C] Thermal efficiency limit of solar power plants

[D] Theoretical plasma density limit in a tokamak fusion reactor

Answer: D
Notes:

Explanation: The Greenwald limit refers to the maximum stable plasma density achievable in a tokamak fusion reactor, beyond which plasma becomes unstable.

Source- TH

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