i like to start a new business in india. pls suggest me some ideas..

You have a great thought. A business to help people is a really good thought.
Tell me your location and where you want to start you business. Also let me know your qualifications and are of expertise.

Its really amazing that you want to work for yourself and build a business from scratch. Kudos to you!
Starting a new business requires you to think what benefit you can provide to the customers, who your customers will be, and hows the best way to reach them among other issues. You also need to consider what your expertise lies in(its best to build your business around something you are truly passionate about) and how you will raise money for your endeavor.
I would suggest you to start small so you can learn the basics of learning how to manage the business. it could be as small as running a lemonade stand or a food stall(if you like being in the food business) or tutor students who are younger than you in areas you are good at. You could even do neighborhood chores for your neighbors like mowing their garden or buy groceries that can get you extra dollars.
If you have deep financial pockets and a passion for technology working in the online digital space is a big area in India right now. Launching a website that meets specific customer needs would be something interesting to consider.

Starting off a business in Dell is a good thought and can think and go ahead with it. In today date there are lot of options open under the make in India campaign and government is also helping and providing financial aid for the same. You can start off with food industry as it a booming business in today's date.