Is it normal for an AC adapter to drop voltage if it's not used by a laptop?

Posted by leladax on Super User See other posts from Super User or by leladax
Published on 2011-01-02T11:22:10Z Indexed on 2011/01/02 11:55 UTC
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I'm currently investigating the livelihood of a laptop adaptor and I noticed, unlike another adaptor it drops voltage to almost zero after I also attempt to measure its current [while it did show voltage at first, before measuring current]. The other adaptor normally shows voltage and then normally shows some current and then if it turns to measure voltage, it shows it normally again.

I assume the adaptor is faulty, however, I want to make sure if laptop adaptors turn off themselves if they aren't used normally by a laptop.

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