IB DP Physics Mock Exam HL Paper 1A Set 3 - 2025 Syllabus
IB DP Physics Mock Exam HL Paper 1A Set 3
Prepare for the IB DP Physics Mock Exam HL Paper 1A Set 3 with our comprehensive mock exam set 3. Test your knowledge and understanding of key concepts with challenging questions covering all essential topics. Identify areas for improvement and boost your confidence for the real exam
▶️ Answer/Explanation
Time period \( T = 2\pi \sqrt{\frac{m}{k}} \)
For one spring: \( T_1 = 2\pi \sqrt{\frac{m}{k}} \)
For identical springs in parallel: \( k_{eff} = 2k \)
So \( T_2 = 2\pi \sqrt{\frac{m}{2k}} = \frac{T_1}{\sqrt{2}} \)
Therefore \( \frac{T_2}{T_1} = \frac{1}{\sqrt{2}} \)
✅ Answer: (B)
▶️ Answer/Explanation
Distance between extreme positions = b ⇒ Amplitude A = b/2
Angular frequency ω = 2πf
In SHM: v = ω√(A² – x²)
At x = A/2 (halfway between equilibrium and extreme):
v = 2πf √[(b/2)² – (b/4)²] = 2πf √[b²/4 – b²/16] = 2πf √[3b²/16] = 2πf × (b√3)/4 = (πfb√3)/2
✅ Answer: (D)
▶️ Answer/Explanation
From the intensity graph:
• Interference fringe spacing relates to λ/d (smaller λ/d gives wider fringe spacing)
• Diffraction envelope width relates to λ/b (smaller λ/b gives wider envelope)
Typically, the diffraction envelope is much wider than the interference pattern, meaning λ/b > λ/d
✅ Answer: (C) λ/d = 0.01, λ/b = 0.1