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← ScienceWhich mechanism causes increased cross-talk when signal frequency increases?
A)Electromagnetic coupling through parasitic capacitance✓
B)Increased dielectric material breakdown strength
C)Quantum tunneling across transmission lines
D)Reduced impedance mismatches along conductors
💡 Explanation
Electromagnetic coupling emerges as frequency rises, because capacitive reactance decreases leading to increased unwanted signal transfer through parasitic capacitance. Therefore cross-talk increases, rather than decreasing from improved dielectric strength.
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