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Which outcome occurs when a resonant cavity's aspect ratio is altered?

A)Shift in resonant frequency occurs
B)Increased dielectric breakdown strength
C)Reduced quality factor observed
D)Waveguide impedance becomes perfectly matched

💡 Explanation

Changing the cavity dimensions modifies the boundary conditions for electromagnetic standing waves; thus, a shift in resonant frequency occurs because the **mode spacing** is altered. Therefore the resonant frequency changes, rather than modifications in impedance or breakdown, which are dependent more on geometry

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