NDA

Candidates can refer to the NCERT books of Classes 11 and 12 for the Physics in NDA exam. NDA Physics syllabus is given below:
Physical Properties and States of Matter
Modes of transference of Heat
Mass, Weight, Volume, Sound Waves and their properties
Simple musical instruments
Rectilinear propagation of Light
Density and Specific Gravity
Reflection and refraction
Principle of Archimedes
Spherical mirrors and Lenses
Pressure Barometer
Human Eye
Motion of objects
Natural and Artificial Magnets
Velocity and Acceleration
Properties of a Magnet
Newtons Laws of Motion
Earth as a Magnet
Force and Momentum
Static and Current Electricity
Parallelogram of Forces
Conductors and Non-conductors
Stability and Equilibrium of bodies
Ohms Law
Gravitation
Simple Electrical Circuits
Elementary ideas of work
Heating, Lighting, and Magnetic effects of Current
Power and Energy
Measurement of Electrical Power
Effects of Heat
Primary and Secondary Cells
Measurement of Temperature and Heat
Use of X-Rays
General Principles in the working of Simple Pendulum, Simple Pulleys, Siphon, Levers, Balloon, Pumps, Hydrometer, Pressure Cooker, Thermos Flask, Gramophone, Telegraphs, Telephone, Periscope, Telescope, Microscope, Mariners Compass; Lightning Conductors, Safety Fuses.

Yes, you can apply for the National Defence Academy NDA if you are currently studying in 12th grade. The NDA entrance exam is open to candidates who have completed or are appearing in the 12th class or equivalent examination. However, there are certain eligibility criteria that you need to fulfill to be eligible for the NDA exam. Here are the basic eligibility requirements:
Nationality: You must be a citizen of India or a subject of Bhutan or Nepal or a Tibetan refugee who came to India before January 1, 1962, with the intention of permanently settling in India. Age: You must be between 16.5 and 19.5 years of age at the time of joining the course. For the specific age limits and relaxation criteria, it is recommended to refer to the official notification or website of the Union Public Service Commission UPSC which conducts the NDA exam. Educational Qualification: For the Army Wing of NDA you should have completed or be appearing in the 12th class or equivalent examination from a recognised board. For the Air Force and Naval Wings, you must have passed or be appearing in the 12th class or equivalent examination with Physics and Mathematics as compulsory subjects. Physical Fitness: Candidates must meet the prescribed physical fitness criteria as specified in the official notification. It's important to note that the eligibility criteria for the NDA exam may be subject to change, and it's advisable to refer to the latest official notification or website of the UPSC for the most accurate and up-to-date information regarding eligibility and application procedures.