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← ScienceWhich unwanted outcome occurs when a microwave oven's magnetron emits excessive power?
A)Excessive food surface browning appears✓
B)Insufficient wave interference occurs inside
C)Reduced molecular kinetic energy transfer
D)Decreased magnetic field within waveguide
💡 Explanation
Excessive magnetron power causes hotspots and surface burning because dielectric heating increases rapidly; Runaway heating occurs, therefore the food surface dries beyond the interior, rather than uniform heating achieved at lower power, protecting the outside of the food.
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