Hey Ranjita ,

There are lots of books in market . you can follow these best books for gate:

* HCV

*Fundamentals of physics by Halliday

*Schaum's series

*CSIR NET phisics by Arihant

• Introduction to quantum mechanics David J griffiths
• Introduction to Electrodynamics David J griffiths
  
• Classical Mechanics by Takwale and puranik
• Classical mechanics by  Goldstein
• Digital electronics by Malvino and leach
• Solid state by Charles kittel
• Thermodynamics by F reif
• Analog Electronics by Allen Mottershed.

Good luck!