Hi All, For previous years papers for Instrumentation, you can follow book by ACE http://aceengineeringpublications.com/virtuemart?view=productdetails&virtuemart_category_id=1&virtuemart_product_id=46 All the best for your exam !!
Blog for Instrumentation Students who want to give GATE exam. Describe various reference books for different subjects. All the best !!