High-Yield & Frequently Examined Questions
Questions curated and analyzed from official NEB/CDC past papers, recurring blueprint patterns, and full-mark rubrics.
Active Scope:All GradesPhysics (Grade 11)
Exam Hierarchy Filters
3 High-Yield Questions in Scope
Showing 3 high-yield questions
Guaranteed Long Question in NEB Grade 11 Physics (Heat & Thermodynamics - 75% occurrence)Class 11 • Physics (Grade 11) • Unit 13
Rating: 5 / 5
Defensible Pedagogical Basis:
Specification Grid Content Area 2 (Heat and Thermodynamics): Derivation of pressure exerted by an ideal gas on container walls is a core 5-mark theoretical derivation required under CDC learning outcomes.
Approach Summary: Assume N molecules in a cubical container of side L. Calculate momentum transfer per collision along one axis, sum for all molecules, divide by wall area and time to find pressure P = (1/3)(mN/V)c_rms² = (1/3)ρ c_rms². Relate to PV = N k_B T to deduce E_avg = (3/2) k_B T.
Open Chapter Unit 13 Notes →High-Frequency NEB Optics Derivation (Appears in ~65% of Board Papers)Class 11 • Physics (Grade 11) • Unit 17
Rating: 5 / 5
Defensible Pedagogical Basis:
Specification Grid Optics (Lenses): Derivation of Lens Maker’s Formula is the primary 4-to-5 mark derivation in the Optics section.
Approach Summary: Apply the single spherical surface refraction formula μ₂/v - μ₁/u = (μ₂ - μ₁)/R across two spherical surfaces of a thin lens. Combine equations and let u -> ∞ to obtain 1/f = (μ - 1)(1/R₁ - 1/R₂).
Open Chapter Unit 17 Notes →Repeated in NEB 2075, 2077, 2079, 2080Class 11 • Physics (Grade 11) • Unit 1
Rating: 5 / 5
Defensible Pedagogical Basis:
Directly addresses CDC Specification Grid LO 1.1: Vector addition laws and conditions for maximum, minimum, and orthogonal resultants.
Approach Summary: State both laws. Use R = √(P² + Q² + 2PQ cos θ) with P = Q = F. (a) θ = 0° (parallel, R = 2F), (b) θ = 180° (antiparallel, R = 0), and (c) θ = 120° (R = F).
Open Chapter Unit 1 Notes →