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← ScienceWhich outcome occurs when an AM radio tower broadcasts?
A)Electromagnetic wave propagates outwards✓
B)Capacitance decreases in antenna feed
C)Signal attenuation lowers transmitter impedance
D)Resonance enhances modulation bandwidth
💡 Explanation
Electromagnetic induction generates a radio wave because oscillating current in the antenna creates propagating fields. Therefore, a wave emits from the tower, rather than changes to impedance, resonance or capacitance since impedance is a resistance, not direct propagation.
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