NSAA Cheat Sheet 2026

The 30 highest-yield NSAA facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which of the following best describes the direction of conventional current in a circuit? → From positive to negative terminal
2. What is P(A|B) if P(A∩B) = 0.12 and P(B) = 0.4? → 0.3
3. In the double-slit experiment, constructive interference occurs when the path difference between the two sources is: → Any multiple of λ
4. An electron moves with velocity v perpendicular to a magnetic field B. What is the shape of its path? → Circle
5. Three resistors of 2 Ω, 3 Ω, and 5 Ω are connected in series. What is the total resistance? → 10 Ω
6. A particle's position is given by s(t) = t³ - 6t. What is the velocity at t = 2? → 6
7. Solve: 2x + 3y = 12 and x - y = 1 simultaneously. What is y? → 2
8. The Doppler effect causes the observed frequency of a source moving toward an observer to be: → Higher than the emitted frequency
9. Which of the following processes results in the formation of gametes? → Meiosis
10. If dy/dx > 0 for all x in an interval, the function is: → Increasing
11. What is the molecular geometry of methane (CH₄)? → Tetrahedral
12. The median of the data set {3, 7, 9, 2, 5} is: → 5
13. A machine does 600 J of work in 30 seconds. What is its power output? → 20 W
14. What is the discriminant of 2x² - 4x + 2 = 0? → 0
15. What is the period of a wave with frequency 50 Hz? → 0.02 s
16. Which of the following elements has the highest electronegativity? → Fluorine
17. The mean of five numbers is 8. If four of the numbers are 6, 7, 9, and 10, what is the fifth number? → 8
18. A circuit has an EMF of 9 V and internal resistance of 1 Ω connected to an external resistor of 8 Ω. What is the terminal voltage? → 8 V
19. What is the second derivative of f(x) = x⁴ - 3x² + 5? → 12x² - 6
20. A 10 kg box is pushed along a horizontal surface by a 40 N force. If friction is 15 N, what is the acceleration? → 2.5 m/s²
21. What is the energy stored in a capacitor of capacitance 4 F charged to 3 V? → 18 J
22. A 10 Ω resistor carries 2 A of current. What power is dissipated? → 40 W
23. Expand and simplify: (x + 3)(x - 5) → x² - 2x - 15
24. What is the intensity relationship between two points at distances r₁ and r₂ from a point source? → I₁/I₂ = (r₂/r₁)²
25. A wave has a frequency of 5 Hz and a wavelength of 4 m. What is its speed? → 20 m/s
26. Solve for x: 3x - 7 = 14 → x = 7
27. What is the impulse on a 2 kg object that changes velocity from 3 m/s to 9 m/s? → 12 N·s
28. A 3 kg object falls freely for 4 seconds from rest. What is its kinetic energy at that point (g = 10 m/s²)? → 1200 J
29. What is the asymptote of f(x) = 1/(x - 3)? → x = 3
30. Standing waves are formed by the superposition of two waves that are: → Identical, traveling in opposite directions