How long will my chicken be broody?

I have a lovely little wyandotte who is broody........has been for about a fortnight nearly, I dont want any hatching egss etc and remove the laid eggs by the others each day, she's not very happy but does get up and walk around etc after ive moved her out fo the nest box......................am I doing the right thing and how much longer will she likely be broody?

Thanks,
Nickyx

Oooooo! the dunking sounds a bit brutal!

Im just a small keeper/enthusiast with five girls (3 purebreds and 2 hybrids) that are more for pet value (with the benefit of the eggs!) so not sure I really want to hatch any (knowing my luck they would all be cockerels!) although the thought is rather appealing.

How long is a piece of string?
Unless you take some sort of action it all depends on the hen, sometimes they don't really settle to it, sometimes they'll sit for a week, sometimes a lot longer, longer even than it would have taken to hatch a batch of eggs! I've never tried breaking a broody, I have silkies because they go broody.

Dunking doesn't need to be in icy water, just ordinarily cold. It's less fuss than a sin-bin, but I have no idea as to their relative effectiveness. 

My cuckoo maran goes broody very frequently but last year she took a week to break (by putting her in the dog cage every day), now it's just 2 days. But egg laying doesn't resume straight away.

Hi Over the years I've always found the best way to bring a hen off being broody is to take her off the nest box and place her outside of the hen hut and run and keep the hen hut door shut.  If she can't see the next boxes for a couple of days, that usually does the trick.  The only problem with this theory is that the rest of my girls are shut in their run with access to the hen house & nesting boxes for laying via the bob hole.  Usually, once the girls have laid, I swap them all over - placing broody in the run with the bob hole to the hen house closed and the laying girls are free to roam anywhere, with access to lay via the then opened hen house door.  It's a bit of a faff, but broody soon gets cooled down and obviously finds it no fun having forced isolation.  You can expect her to be off laying for a couple of weeks.  I also find that sometimes a broody sat in the nest box puts the other girls off laying.  So you can expect yields to be down when all this is going on.  Hope this helps