Mass-Energy & Binding Energy Challenge
25 NEET-standard questions on E = mc², mass defect, nuclear binding energy and the binding-energy-per-nucleon curve. Answer each one. If you get it wrong, Vidya Ma’am explains it with an animated movie you can control, a slider to play with, and a step-by-step solution. Then try again.
NCERT Physics XII Part II · Ch. 13 · pp. 310–312Keys: A–D or 1–4 to answer
🧠 Formula memory tricks (open before you start)
Mass-energyE = mc²1 mg = 10⁻⁶ kg gives 9×10¹⁰ J
Atomic mass unit1 u = 931.5 MeV/c²energy (MeV) = mass (u) × 931.5
Mass defectΔM = [Z mₚ + (A − Z) mₙ] − Mnuclear M = atomic mass − Z mₑ
Binding energyEb = ΔM c²energy to separate = energy released on forming
Per nucleonEbn = Eb / Apeak ≈ 8.75 MeV at A = 56; ≈ 7.6 MeV at A = 238
Energy releasedQ = A × (Ebn,final − Ebn,initial)moving towards the peak releases energy
Flat middleNearly constant for 30 < A < 170: short-range nuclear force, saturation.
right first tryfixed after explanationstill to fix
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