5054/21/M/J/25 May/June 2025 Full Paper 2 Solved | O Level Physics

O Level Physics 5054/21 May/June 2025 Paper 2 full solutions in Urdu: every question step by step with Sir Mahad Amer 📲 Live classes & admissions — WhatsApp Sir Mahad Amer: https://wa.me/message/CKEDMPETUF4KA1 Paper code: 5054/21/M/J/25 (5054_s25_qp_21) O Level Physics 5054/21 May/June 2025 solved – Cambridge O Level Physics Paper 2 (Theory), variant 1, with every question broken down step by step. Concepts, exam technique and mark-scheme precision for the May/June 2025 session. Sir Mahad Amer solves the complete 5054/21 May/June 2025 paper so you stop memorising answers and start understanding the physics behind them. Each solution focuses on the concept being tested, the exam technique needed and the precise wording the mark scheme expects. What you'll learn: • Every question of 5054/21 May/June 2025 solved step by step • The concept behind each question • Exam technique for O Level Physics Paper 2 (Theory) • Mark-scheme precision: how to word answers for full marks ⏱️ Chapters: 0:00 Q1: Skydiver falling vertically: speed–time graph 1:55 Gradient & decreasing acceleration 3:00 Forces on the skydiver: weight & air resistance 4:00 Terminal velocity: resultant force = 0 5:19 Resultant of horizontal & vertical forces 6:00 Magnitude of the resultant (412 N) 9:00 Q2: Suitcase weighed with a uniform plank 10:04 Maximum weight & the principle of moments 13:00 Bus tilting on a slope: centre of gravity 15:28 Q3: Motor lifting a load: energy transfers 17:44 Why motor efficiency is less than 100% 20:00 Energy supplied: power = energy ÷ time 22:00 Q4: Evaporation: fast molecules escape, cooling effect 22:38 Evaporation vs boiling 23:13 Refrigerator: convection from the cooling coil 25:00 Final temperature calculation 26:12 Q5: Ripple tank waves: frequency 📲 Live classes & admissions — WhatsApp Sir Mahad Amer: https://wa.me/message/CKEDMPETUF4KA1 29:00 Waves entering shallow water: drawing crests 30:00 Diffraction through a small gap 30:28 Q6: Circuit to determine resistance 31:24 Variable potential divider 34:00 Current in 90 cm of wire 37:30 Resistance & cross-sectional area 38:00 Q7: Transformer: alternating output voltage 40:42 Number of turns on the secondary coil 42:00 Drawing an a.c. trace on the screen 44:09 Q8: Plutonium-239 & nuclear fission 47:00 Control rods & moderator 48:00 Alpha vs beta: mass & charge 49:30 Q9: Life cycle of a star 51:57 Forces in a stable star 52:53 Supernova & light-years 54:36 Galaxies moving away: expanding Universe ▶ Full playlist:    • O Level & IGCSE Physics Past Papers Solved...   📚 Related:    • Topical Past Papers | O Level & IGCSE Phys...   Yeh lecture Urdu mein hai — 5054/21 May/June 2025 ke saare sawalat step by step solve karein aur mark scheme ke mutabiq jawab likhna seekhein. ━━━━━━━━━━━━━━ 🎓 Study with Sir Mahad Amer — Cambridge-certified Physics teacher (MSc Physics), founder of MAC Education Network (Physics with MAC). Live online classes + a complete recorded course for O Level Physics (5054) & IGCSE Physics (0625) — structured lessons, notes, topical past papers and doubt-clearing sessions. 7+ years • 1,000+ students • 90% A*/A 💬 Enrol, batch timings & fees (WhatsApp): https://wa.me/message/CKEDMPETUF4KA1 📘 Free notes & past papers: https://sirmahadamer.com/resources/ 🌐 Website: https://sirmahadamer.com 📸 Instagram:   / mahad__amer   👍 Facebook:   / mahadamer2000   #OLevelPhysics #5054 #PastPapers #PhysicsInUrdu