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← ScienceWhich outcome is observed when a radio wave's frequency approaches the resonant frequency of a receiving antenna's capacitance?
A)Increased signal strength; induced current✓
B)Decreased impedance; reflected signal
C)Reduced bandwidth; noise amplification
D)Harmonic distortion; saturation effects
💡 Explanation
Increased signal strength occurs because at resonance, the impedance is minimised, maximising current flow due to electromagnetic induction. Therefore, signal strength increases as the antenna efficiently captures the wave's energy, rather than reflecting it or distorting bandwidth at other frequencies.
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