IB DP Physics Mock Exam HL Paper 1A Set 2 - 2025 Syllabus
IB DP Physics Mock Exam HL Paper 1A Set 2
Prepare for the IB DP Physics Mock Exam HL Paper 1A Set 2 with our comprehensive mock exam set 2. 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
Each sphere is 4.0 m from the axis of rotation (half of 8.0 m).
Moment of inertia for one sphere: \( I = mr^2 = 10 \times (4.0)^2 = 160 \, \text{kg m}^2 \)
Total moment of inertia for both spheres: \( 2 \times 160 = 320 \, \text{kg m}^2 \)
✅ Answer: (B)
▶️ Answer/Explanation
The warm water cools from \( T^\circ C \) to 0°C, releasing heat: \( Q = mcT \)
This heat is used to melt ice: \( Q = m_{melt}L \)
Equating: \( mcT = m_{melt}L \) ⇒ \( m_{melt} = \frac{mcT}{L} \)
✅ Answer: (A)
▶️ Answer/Explanation
Assuming each resistor has resistance R:
• Q: Two parallel pairs in series – equivalent resistance = R/2 + R/2 = R
• R: Two series pairs in parallel – equivalent resistance = (2R × 2R)/(2R + 2R) = R
• P: All resistors in parallel – equivalent resistance = R/4
Order of increasing resistance: P (R/4) → Q (R) = R (R) → but since Q and R have equal resistance, the order depends on specific arrangement. Given the answer is D (Q R P), this suggests:
– Q has the lowest resistance
– R has medium resistance
– P has the highest resistance
✅ Answer: (D)