I am a 10th class student and have interest in computer field but i don't like physics and chemistry,which subject should i opt for in 11th?

Well you can go for Maths with Economics and other options (i think under humanities or under commerce). I am not sure how good you are with maths and programming. If you are, then you must pick up a language whether PHP/ HTML5 (web dev), .Net (for software dev) Java/ Android (for apps) or C#/ Unity

Student, If you're creative, you can always consider going for Design and Animation. A good mentor and wise selection of courses with a good school, followed by diligent learning, would get you a head start in your career. However, you must check your suitability for this field. Animation is an art

You can purse different computer courses which don't involve physics and Chemistry