NDA — Syllabus & notes
Syllabus and study notes
Revision & Exam Traps· 19 formulae · 8 traps
Maths · Quadratics
Check the discriminant first: D>0 two real roots, D=0 equal, D<0 none. Don’t solve before checking nature.
Maths · Differentiation
Maths · Integration
Maths · Progressions
Maths · Coordinate Geometry
Maths · Trigonometry
sin²θ means (sinθ)², not sin(θ²) — a notation trap that changes the value.
Maths · Permutations & Combinations
Maths · Probability
Maths · Binomial Theorem
Physics · Kinematics
In v² = u² + 2as, a is negative for deceleration — keep the sign or the stopping distance comes out wrong.
Physics · Laws of Motion
Physics · Work, Energy & Power
Physics · Circular Motion
Centrifugal force is a pseudo-force in the rotating frame; the real inward force is centripetal. Don’t mix frames.
Physics · Gravitation
Physics · SHM
Physics · Electrostatics
Physics · Current Electricity
Physics · Ray Optics
Physics · Modern Physics
Maths · Counting
nPr is ordered (arrangements), nCr is unordered (selections). “Arrange” → P, “choose” → C.
Physics · Optics
Mirror/lens sign convention: distances against the incident light are negative. A dropped sign flips real ↔ virtual.
Physics · Modern
Photoelectric emission depends on FREQUENCY, not intensity — below threshold frequency, no emission however bright.
Physics · Units
Convert km/h → m/s with ×5/18 (not 18/5). Mixing the factor inverts kinematics answers.
NDA Syllabus (2025)
4 subjects · 182 topics
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