Here is a very cheap Tablet PC but with very good configuration. Salora ProTab HD is very high in configuration you check about Processor, RAM, Display or anything else. Only battery is of little concern. But you are not going to find such Tablet PC at this price range. Battery is also good enough. It gives 4 hrs on regular use. Price of Salora ProTab HD is only Rs 5499 at Flipkart.
Processor: 1.2 GHz ARM Cortex - A9
RAM: 1GB DDR3
Display: 7 inch and Resolution: 1024 * 600 (180 ppi is good)
Weight: Only 290 gm (easy to hold on hand for long)
Connectivity: Wi-Fi and 3G (Dongle support).