IB DP Physics Mock Exam SL Paper 1A Set 1 - 2025 Syllabus
IB DP Physics Mock Exam SL Paper 1A Set 1
Prepare for the IB DP Physics Mock Exam SL Paper 1A Set 1 with our comprehensive mock exam set 1. 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
1. Relate Acceleration and Velocity:
The change in velocity (\(\Delta v\)) is equal to the area under the acceleration-time graph. Since the object starts at rest (\(u=0\)), the final speed \(v\) is equal to this area.
2. Calculate Area (Triangle):
The graph is a straight line passing through the origin. At \(t=8.0\) s, read the acceleration from the graph. It corresponds to \(a=8.0\) ms\(^{-2}\).
Area = \(\frac{1}{2} \times \text{base} \times \text{height}\)
Area = \(\frac{1}{2} \times 8.0 \text{ s} \times 8.0 \text{ ms}^{-2}\)
Area = \(32\) ms\(^{-1}\).
✅ Answer: (B)
▶️ Answer/Explanation
1. Analyze Process:
Rapid compression implies an adiabatic process (no time for heat transfer, so Q=0). The work is done on the gas.
2. Microscopic View:
When a molecule collides with a moving wall (the piston moving inward), it rebounds with a higher speed than it struck with (similar to a tennis ball hit by a racket). This gain in kinetic energy increases the average speed (and temperature) of the gas.
✅ Answer: (C)
▶️ Answer/Explanation
1. Define Current:
Current \(I = \frac{\Delta Q}{\Delta t}\) (charge transferred per unit time).
2. Determine Charge Flow Rate:
In one second, a length of belt \(L = v \times 1 \text{ s} = 2.5\) m passes the point.
The area of this section is \(A = \text{width} \times L = 0.60 \text{ m} \times 2.5 \text{ m} = 1.5 \text{ m}^2\).
3. Calculate Total Charge in that Area:
Charge \(Q = \sigma \times A\)
\(Q = 5.0 \text{ mC m}^{-2} \times 1.5 \text{ m}^2 = 7.5 \text{ mC}\).
4. Calculate Current:
This charge flows each second, so
\(I = 7.5 \text{ mC} / 1 \text{ s} = 7.5 \text{ mA}\).
✅ Answer: (B)