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Message: <blockquote data-quote="midnightg35x" data-source="post: 6393159" data-attributes="member: 608400">You're kidding right?  A capacitor wired in series with a line will certainly block DC.  Find me an example where this isn't true.  I'm guessing in your homework there are other components in parallel with that cap if any DC is getting through.  That or your homework is whack //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif  Unless you're talking tiny fractions of the power supply voltage due to capacitor parasitics, a capacitor in series is going to block DC.If you don't believe me, go get a tiny cap, a resistor and an AA battery.  Hook up +battery --&gt; +cap-  --&gt;  +resistor- --&gt; -battery (everything in series).  Tell me what the voltage drop across that resistor is.</blockquote>

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