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← ScienceWhich mechanism limits plasma confinement time in tokamaks?
A)Magnetohydrodynamic (MHD) instabilities✓
B)Bremsstrahlung radiation cooling
C)Inertial confinement pressure limits
D)Neutron activation of vessel walls
💡 Explanation
Magnetohydrodynamic (MHD) instabilities limit confinement because they disrupt magnetic fields, enabling rapid energy loss from plasma. Therefore, fusion reactions cease, rather than continuing at a reduced rate affected by Bremsstrahlung radiation cooling or pressure alone.
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