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← ScienceWhich risk is amplified when increasing frequency on a printed circuit board beyond material frequency limits?
A)Dielectric losses due to polarization lag✓
B)Conductor migration from electron tunneling
C)Reduced cooling from laminar air flow
D)Increased resistance from skin effect
💡 Explanation
When frequency increases significantly on PCBs, the dielectric material's polarization lags behind the rapidly changing electric field leading to increased dielectric losses due to the inability of dipoles to align quickly enough. Increased dielectric losses amplified, rather than migration, cooling or skin effect, which have related but distinct causes.
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