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Which risk increases when a PCB decoupling capacitor fails?

A)Increased ripple voltage on power rails
B)Amplifier oscillation at audio frequencies
C)Signal attenuation from impedance fluctuations
D)Decreased processor power consumption levels

💡 Explanation

Increased ripple voltage occurs because the capacitor no longer effectively performs its intended decoupling function. Specifically, failing capacitance causes higher impedance at ripple frequencies; therefore, voltage regulation degrades, rather than providing a stable power supply.

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