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If so we could block the MULEs and scans, etc.

What about other buildings?

I'm assuming it will wipe Protoss shields. That means if you have a double ghost you could throw down a nuke with one and EMP with the other right before the nuke hits.

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PS: an edit was made to add strategy tag but I think this is more of a tactic than a strategy, coined a tactics tag – ioSamurai Aug 12 '10 at 21:15
One ghost with some energy built up can actually emp and nuke by itself. For an awesome example as well as just some general ownage, see – en1gmatic325 Aug 16 '10 at 18:46
up vote 4 down vote accepted

Yes, EMP will drain the energy of buildings. It will also do, IIRC, 100 damage to shields, but not necessarily take them out completely.

I have not confirmed, but I have read that it will also reveal cloaked and burrowed units for a period of item as well.

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it does reveal cloaked units – Eric Aug 14 '10 at 0:23
@Eric do you know how long it de-cloaks units for? If you fire one at a mothership and de-cloak all the units next to it, how long do you get before they re-cloak? – Nick Mar 25 '11 at 16:41
@Nick 7 seconds real time (10 seconds Starcraft time). Note: The new Protoss expansion will use real time instead of blizzard time. – ChaseC Jul 13 '15 at 13:37

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