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← HistoryWhich mechanism initially limited the range of early telegraph systems before signal amplification?
A)Electromagnetic interference from atmospheric sources
B)Signal attenuation due to cable capacitance✓
C)Polarization drift degrading current detection
D)Mechanical wear increasing resistance
💡 Explanation
When early telegraph signals traveled through long cables, signal attenuation occurs because the cable's capacitance stores charge, weakening the current over distance. Therefore, range was limited, rather than by interference, polarization, or wear, each requiring different environmental or operational factors.
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