Is the charger of iPad and iPad 2 same? I want to buy i extra charger for my iPad but in future I can buy iPad 2 also. So I want to buy a charge which should be compatible with iPad and ipad 2 both.
The charger is 10W like the old iPad. It's called iPad 10W USB Power Adapter and has product number MC359LL. Specs and QnA are available at the Apple US online store.
It is probably also useful to know that you can also charge an iPad using any iPhone or iPod Touch charger. It will charge a lot slower when not using the iPad specific charge, but it will still charge it.
The non-iPad chargers don't however provide enough power to charge the iPad while it is using used, they will provide enough to stop it discharging though.