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← ScienceWhich outcome occurs when a waveguide's impedance changes abruptly?
A)Reflection wave due to impedance mismatch✓
B)Increased dielectric breakdown strength linearly
C)Higher order mode becomes dominant
D)Reduced power density along propagation
💡 Explanation
A reflection wave occurs because impedance mismatch triggers wave reflection; therefore, energy bounces back rather than propagating fully forward, unlike dielectric breakdown or mode changes, which depend on different conditions.
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