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Which outcome occurs when a higher dielectric material fills a parallel plate waveguide at frequencies near cutoff?

A)Increased signal propagation velocity occurs
B)Reduced wave impedance is experienced
C)Enhanced energy transmission efficiency occurs
D)Decreased waveguide bandwidth limitation results

💡 Explanation

Reduced wave impedance results because adding a higher dielectric material alters the waveguide's *capacitance per unit length*; rather than increase velocity, the increased capacitance causes a lower impedance because impedance relates to capacitance inversely therefore influencing wave propagation characteristics.

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