IB DP Physics Mock Exam HL Paper 1A Set 4 - 2025 Syllabus
IB DP Physics Mock Exam HL Paper 1A Set 4
Prepare for the IB DP Physics Mock Exam HL Paper 1A Set 4 with our comprehensive mock exam set 4. 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
Question
A mass M oscillates with a period T when connected to a spring with spring stiffness constant k. A mass of 2M is connected to 2 identical springs, each with spring stiffness constant k.
What is the period of the system?
▶️Answer/Explanation
Ans A
Question
Diagram 1 shows the variation with position of the displacement of a standing wave formed on a string.
Diagram 2 shows the variation with position of the displacement of a travelling wave moving to the right along a string.
Points $\mathrm{P}, \mathrm{Q}, \mathrm{R}$ and $\mathrm{S}$ are points on the string.
What is the phase difference between $\mathrm{P}$ and $\mathrm{Q}$ and the phase difference between $\mathrm{R}$ and $\mathrm{S}$ ?
▶️Answer/Explanation
Ans:C
Question
A reflecting surface is covered with a thin film of refractive n and thickness t. The refractive index of the reflecting surface is greater than the refractive index of the thin film.
Light of wavelength λ is incident normally from air on the thin film. What is the minimum thickness of the film for which no light is reflected back into the air?
A. \(\frac{\lambda }{4n}\)
B. \(\frac{\lambda }{4}\)
C. \(\frac{\lambda }{2n}\)
D. \(\frac{\lambda }{2}\)
▶️Answer/Explanation
Ans A