Which effect arises when a high-power microwave source exceeds its coupling limit?

💡 Explanation

Plasma formation leads to microwave cutoff in the propagation channel because dielectric breakdown ionizes the air via impact ionization, acting as a reflector. Therefore transmission ceases beyond threshold rather than increasing, due to ohmic losses reducing cavity Q or enhancing signals.

• Which consequence results when excessive vibrational energy affects unimolecular decomposition?
• Which mechanism primarily leads to a lower mass for deuterium compared to the sum of its constituent protons and neutrons?
• Which outcome results when strong gravity increases linearly?
• Which mechanism causes increased magnetoresistance sensitivity in a Permalloy crystal?
• Which efficiency limit occurs when imperfect heat transfer?
• Which outcome is driven by increased entropy during water electrolysis?