Hello dear

As to give the jee advanced for barch ( AAT) , you have to qualify the jee advanced and for this you need to prepare physics ,chemistry and maths

But in the AAT there will be no physics and chemistry.

There will be other topics like free hand drawing,  geometrical drawing etc.

I am providing you the link where you can see all the necessary details :

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-advanced-aat/amp

Good luck