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← ScienceWhich outcome results when an unshielded cable carrying high-frequency signals nears a sensitive analog circuit?
A)Spurious signals induced by electromagnetic induction✓
B)Increased capacitive loading on the signal source
C)Reduced signal attenuation due to impedance matching
D)Thermal noise reduction by mutual inductance
💡 Explanation
When an unshielded cable radiates, electromagnetic induction occurs because the alternating magnetic field emanating from the cable induces currents in nearby conductive loops within the analog circuit. Therefore, spurious signals are induced, rather than predictable loading, reduced attenuation, or thermal noise reduction, all of which require different coupling mechanisms.
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