Question
The capacitor in Figure 23.55(b) will filter high-frequency signals by shorting them to earth/ground. (a) What capacitance is needed to produce a reactance of $10.0 \textrm{ m}\Omega$ for a 5.00 kHz signal? (b) What would its reactance be at 3.00 Hz? (c) Discuss the implications of your answers to (a) and (b).
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1. $3.18 \textrm{ mF}$
2. $16.7 \textrm{ }\Omega$
3. The reactance at high frequencies is very low, allowing it to short these frequencies to ground. Low frequencies experience a much higher reactance and do not flow as easily through the capacitor to ground.
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