Yes we can apply ews certificate number in ap eamcet official website www.apeamcet.nic.in

And they will allot seats under this quota in second phase counselling

Yes it is applicable .

You have to submit income certificate during certificate verification process .

The centre has passed the bill for ews quota 10 percent

Refer this website for more information

https://www.careers360.com/exams/ap-eamcet